Cell respiration. IV. Oxidation mechanism of potato. A. VON SZENT-GYÖRGYI (Biochem. Z., 1925, 162, 399-412). The guaiacum reaction with potato results from the oxidation by oxydase of a pyrocatechol to an o-diketoquinone, which directly oxidises the guaiacum reagent without assistance from peroxides or peroxydases. In the oxydase system of the potato is present, besides the pyrocatechol, another substance, "tyrin," probably a respiratory pigment, the leuco-base of which is oxidised directly to the pigment by diketoquinone. Tyrin is present in warm-blooded tissues and its properties are discussed. P. W. CLUTTERBUCK.

Catabolism of starch in mesophyll and guard cells. S. STRUGGER and F. WEBER (Ber. deut. bot. Ges., 1925, 43, 431-438).—In the mesophyll cells of the leaves of Ranunculus ficaria, the breaking down of starch is accelerated by the addition of 0.1Mcalcium or potassium chloride to the nutrient medium ; these salts, however, are mutually antagonistic in their effect on the starch breakdown in the guard cells, potassium chloride accelerating, and calcium chloride having an inhibitory effect. Calcium chloride inhibits also the opening of the stomata. H. J. CHANNON.

Melilotoside, the glucoside from which is formed coumaric acid, extracted from the flowers of Melilotus altissima and of M. arvensis. C. CHARAUX (Bull. Soc. Chim. biol., 1925, 7, 10561059). From the flowers of these plants melilotoside, C15H1808,H2O, m.p. 240-241° (decomp.),[a]D-64-10°, is obtained in yields of 0.5 g. and 0.28 g., respectively, of crude compound per 100 g. of dry flowers. It has a bitter taste, is readily soluble in hot and sparingly soluble in cold water, has marked acid properties, and forms a crystalline lead salt. When hydrolysed by emulsin, or by heating with dilute mineral acids, it yields 1 mol. of coumaric acid and 1 mol. of dextrose, and therefore is assigned the formula

CO H CHÍCH CH•O C,H,O,

6 11 5.

W. Ö. KERMACK.

Plant phosphatides. II. Water-soluble phosphatides of Aspergillus oryzæ. V. GRAFE and H. MAGISTRIS (Biochem. Z., 1925, 162, 366-398).Water-soluble phosphatides are obtained by dialysis of Aspergillus oryzae and are separated into several fractions: (1) The substance precipitable by lead

48

acetate in neutral solution : a monoaminomonophosphatide, lead salt, C4H95015NPPb2, P: N= 1:1-21, giving on hydrolysis oleic, palmitic, and phosphoric acids, betaine, glycerol, and dextrose; the same phosphatide is precipitated from neutral solution by cadmium chloride. Precipitated by chloride. Precipitated by benzene from its alcoholic solution, its composition becomes C3H88010NP, P: N=1:1, and it gives the same products on hydrolysis. (2) The solution from (1) is made alkaline with ammonia and precipitated with more lead acetate. The lead salt of diaminomonophosphatide is obtained, composition C29H60O8N2PPb5, P: N=1:2-01, which on hydrolysis gives choline, betaine, palmitic and phosphoric acids, and glycerol. (3) Alcohol precipitation of the filtrate from (2) gives a monoaminomonophosphatide which on hydrolysis yields choline, a solid fatty acid,

succinic acid, phosphoric acid, and dextrose. P: N= 1: 0.96. (4) The filtrate from (3) contained either another phosphatide or a series of hydrolytic products, P: N=1:5. On hydrolysis, choline, adenine, oleic, linoleic, palmitic, and phosphoric acids, glycerol, and dextrose were obtained. P. W. CLUTTERBUCK.

Influence of media on germination of seeds in absence of calcium. R. CERIGHELLI (Compt. rend., 1925, 181, 728-730).-Under the conditions studied, namely, sterilisation or non-sterilisation of the seeds, immersion or non-immersion in water or in watervapour, peas germinate and grow more rapidly in the presence of calcium salts. L. F. HEWITT.

Mercurialis. III. Physiological significance of the chromogen. P. HAAS and T. G. HILL (Ann. Bot., 1925, 39, 861-865; cf. A., 1925, i, 759).—The colourless chromogen extracted from Mercurialis is named "hermidin." It is readily oxidised by air to blue" cyanohermidin " and thence to yellow "chrysohermidin," the two stages of oxidation requiring equal amounts of oxygen. Chrysohermidin is reducible by an aluminium-mercury couple to cyanohermidin and thence to hermidin. A mechanism exists in Mercurialis for the reduction of cyanohermidin, and it is suggested that the chromogen plays some part in the absorption and transfer of oxygen in the plant. C. P. STEWART.

Plant cuticle. II. B. LEE (Ann. Bot., 1925, 39, 755-768).-Cutin, unlike suberin, contains neither phellonic acid nor glycerol. It is a complex mixture of fatty acids both free and combined with alcohols, soaps, unsaponifiable material which probably contains higher alcohols, resinous and tannin-like substances. Hydroxy-acids are present in greater amount than normal fatty acids, a fact which may be due to oxidation during the deposition of the cuticle. C. P. STEWART.

Nitrogenous constituents of alfalfa (lucerne). H. B. VICKERY (J. Biol. Chem., 1925, 65, 657-664; cf. A., 1925, i, 1370).-The precipitate obtained from "alfalfa filtrate " by mercuric acetate and sodium carbonate was decomposed and the resulting solution treated with phosphotungstic acid, yielding a filtrate which contained the asparagine and amino-acids. From this filtrate were isolated directly asparagine 0-411% and tyrosine 0-0027%, calculated on the weight of dry plant; after hydrolysis with 20% hydrochloric acid, there were further obtained aspartic acid 0.112, phenylalanine 0.019, serine 0-055, leucine 0-0472, valine 0-0658, and alanine 0.0265% of the dry plant. Assuming the aspartic acid to have been formed by hydrolysis from asparagine, the amount of the latter accounts for 77.1% of the amide nitrogen, and the sum of the substances isolated makes up 29.5% of the solids and 54.8% of the total nitrogen of the amino-acid fraction. Serine and alanine are here for the first time recorded as constituents of a C. R. HARINGTON. plant juice.

Absolute and percentual alkaloid content of various parts of Lupinus luteus L. during growth. T. SABALITSCHKA and C. JUNGERMANN (Biochem. Z., 1925, 163, 445-456).-The total alkaloid (lupinine and lupinidine) and its distribution

in various parts of the plant were traced from the seed through 18 weeks of growth. The total alkaloid in the plant and in its various parts increases, after an initial decline in the first 2 weeks, to a maximum in 14 weeks. The variations in the concentrations of alkaloid in the various parts were less regular. R. K. CANNAN.

Application of fluorescence phenomena in biological chemistry. R. FABRE (Bull. Soc. Chim. biol., 1925, 7, 1024-1037). The fluorescent properties of certain substances under ordinary or, more particularly, under ultra-violet illumination may be used for their qualitative and quantitative investigation. Details are given of the application of the method to the investigation of the elimination in the urine of such alkaloids as hydrastine or quinine, the alkaloid in the former case being oxidised to hydrastinine by agitation of the solution of the sulphate, in the presence of air, before examination. The method has further been applied to the detection of salicylic acid in the milk after administration of aspirin, and to the investigation of small quantities of hæmatoporphyrin such as are found in the Harder gland of the rat.

W. O. KERMACK.

Pyrotannic acid method for determination of carbon monoxide in blood and in air. R. R. SAYERS and W. P. YANT (U.S. Bur. Mines, Tech. Paper 373).-Blood is diluted to twenty times its volume, a mixture of tannin and pyrogallol is added, and the colour of the solution matched against the colours produced by bloods containing known amounts of carbon monoxide, or against artificial standards. Carbon monoxide in air is determined by shaking a sample of air with fresh blood and determining the amount of carbon monoxide in the blood as above, whence the partial pressure of carbon monoxide in the air may be calculated.

L. F. HEWITT.

Absorption of oxygen by pyrogallol. E. VON KOVÁCS-ZORKÓCZY (Biochem. Z., 1925, 162, 161168).-Determinations of the the oxygen-absorbing capacity of pyrogallol by means of Barcroft's differential apparatus were carried out. In making the pyrogallol solutions, the alkali was varied, sodium, potassium, and barium hydroxides being used and the efficiency of the solutions compared. As a mean of some thirty experiments it was found that 2 g.-mol. of pyrogallol absorb 5 atoms of oxygen.

H. G. REEVES. Micro-determination of base in blood and biological materials. W. C. STADIE and E. C. Ross (J. Biol. Chem., 1925, 65, 735-754).-A modification of the method of Fiske (A., 1922, ii, 408), in which an aliquot portion of the filtrate from the benzidine sulphate is titrated instead of the precipitate itself. Phosphates do not interfere with the method unless present in greater amount than 10 equivalents for every 100 equivalents of base; if present in greater amount, they are removed, after the incineration, by precipitation with ferric ammonium sulphate, the excess of iron being removed with ammonia. The error of the method is 1%. C. R. HARINGTON.

Colorimetric determination of calcium-ion concentration. Ionic equilibrium in the organism. F. HAFFNER and R. SIMON (Arch. exp. Path. Pharm., 1925, 109, 129–142).-The degree of decoloris ation of acid dyes which form undissociated calcium salts may be used as a colorimetric measure of the concentration of calcium in solution; moreover, the

depressing effect of added citrate and phosphate on the decolorisation indicates that the process is dependent on the concentration of free calcium ions. For physiological purposes, the most suitable dye is dianil-brown-M.H., which is not affected by changes indicates that in ordinary Ringer's solution the calcium in PH over the physiological range. This method chloride is 50% dissociated; the calcium-ion concentration of a solution remains unaltered during repeated perfusion through the surviving limbs and undergoes marked change. Increasing alkalinity of heart of a frog, although the pH of such a solution the perfusion fluid causes a depression in the concentration of calcium ions, but an accentuation of ation of the tissues by the increased hydroxyl-ion their physiological effect, which indicates a sensitisC. R. HARINGTON.

concentration.

Nephelometric determination of calcium and magnesium. II. L. KRISS (Biochem. Z., 1 25, 162, 359-365).-The nephelometric determination of calcium and magnesium in presence of one another is attained by a combination of the methods of Feigl and Pavelka (A., 1924, ii, 784) for calcium together with magnesium and of Kleinmann (A., 1923, ii, 433) for calcium, and is used for their determination in blood. P. W. CLUTTERBUCK.

Determination of cholesterol. L. SURÁNYI and A. KORÉNYI (Biochem. Z., 1925, 160, 178-182).Alcoholic cholesterol solutions containing increasing amounts of cholesterol are added to the same amount of distilled water, and the additional amount of precipitated cholesterol is tabulated. The table is alcoholic solution required just to redissolve the

used for the determination of the amount of cholesterol in blood. P. W. CLUTTERBUCK.

E.

Micro-determination of blood-sugar. KOMM (Z. angew. Chem., 1925, 38, 1094-1096).— With a pipette containing a minute crystal of sodium oxalate 0.4 c.c. of blood is transferred to a tube, diluted to 2 c.c., and treated with 1 c.c. of 10% sodium tungstate solution and 1 c.c. of 0·67Ñsulphuric acid. After centrifuging, 2 c.c. of the clear liquor are transferred to a second similar tube, treated with 1 c.c. of Fehling's solution, heated to precipitate cuprous oxide, cooled, and centrifuged. The liquor is poured off and the precipitate washed several times with water under centrifugal action. The cuprous oxide is dissolved in 0.3 c.c. of 0.5% nitric acid, 0-6 c.c. of 25% ammonia solution is added, and the copper determined colorimetrically in the micro-colorimeter of Autenrieth and Königsberger; 1 mg. of copper corresponds with 0.69 mg. of dextrose. The results obtained agree closely with those obtained by Bang's method. A. R. PoWELL.

ABDERHALDEN, E., and Haas, R., 181. Abderhalden, E., and Schwab, E., 181. Abe, Y., 195.

Abelles, N., 200.

Abelous, J. E., and Soula, L. C., 204. Acklin, O., 203.

Adam, N. K., Morrell, R. S., and Norrish, R. G. W., 120.

Adams, R. See Calvery, H. O., and
Tuley, W. F.

Adova, A. N. See Smorodincev, J. A.
Akerlöf, G., 125.
Alquier, J.

See Randoin, L.

Alt, A. See Tillmans, J.

Anson, M. L., and Mirsky, A. E., 189. Ardagh, E. G. R., and Williams, J. G., 162, 189.

Arndt, F., 177.

Arrhenius, S., 133.

Artom, C., 201.

Asher, L., and Uchida, S., 206.
Asselin. See Randoin, L.

Astachov, K. See Vosnessenski, S.
Ato, S. See Wada, I.

Aubertot, V.

See Mougeot, A.

Audubert, R., 104.
Auerbach, R., 122.

Auwers, K. von, and Kraul, R., 109.
Azuma, R., and Kameyama, N., 129.
Azzalin, E., 140.

Ball, R. W. See Seyer, W. F.
Banerji, K. See Raman, C. V.
Bang, I., 195.

Bardwell, D. C. See Perry, J. H.
Barsch, H. See Bucherer, H. T.
Barth, T., and Lunde, G., 114.
Baugert, F. See Wittig, G.
Bayer, O. See Braun, J. von.
Bedos, P. See Godchot, M.

Beese, N. C. See Sawyer, R. A.
Beja, M. See Riesenfeld, E. H.
Benedict, E. M. See West, R.

Bennett, G. M., and Hock, A. L., 146.
Berend, G. See Ohle, H.

Bergmann, M., 152.

Berner, E., 116.

Berres, C. See Dilthey, W.

Bert, L., and Dorier, P. C., 164.

Berthelsen, K. See Walbum, L. E.
Bettzieche, F., 155.

Bettzieche, F., and Ehrlich, A., 154, 155.

Bhatia, S. L. See Yajnik, N. A.

Biggs, E. J. See Glasstone, S.
Biltz, H., and Klein, H., 182.

Biltz, W., and Mühlendahl, E. von, 136.
Biltz, W., and Specht, F., 110.
Biltz, W. See also Birk, E.
Birge, R. T., 104.

Borel, E. See Perrier, A.
Bosanquet, C. H., 115.

Bose, D. M., 106, 111, 114.

Boswell, M. C., and Dilworth, H. M., 134.
Boucher, P. E., 105.
Bougault, J., 167.

Boutaric, A., and Manière, (Mme.) Y., 123.

Bradley, A. J., and Ollard, E. F., 112.
Brady, O. L., and Perry, H. M., 171.
Bramley, H., 107.

Brand, K., and Sasaki, J., 157.
Braun, G. See Zemplén, G.
Braun, J. von, and Bayer, O., 172.
Braun, J. von, and Reich, H., 178.
Braune, H., 128.

Bredig, M. See Kallmann, H.
Bridel, M., and Charaux, C., 201.
Briggs, A. P. See Bishop, G. H.
Briggs, G. E., 201.
Brillouin, L., 107.
Britton, H. T. S., 135.
Bruchhausen, F. von, 184.

Bruchhausen, F. von, and Saway, K., 185.

Brugsch, T., Cahen, M., and Horsters, H., 197.

Brugsch, T., and Horsters, H., 197. Brugsch, T., Horsters, H., and Harada, Y., 198.

Brugsch, T., Horsters, H., and Narita,
S., 198.

Brukner, B., and Uhlenbruck, P., 191.
Brunetti, R., 107.
Bruns, H., 128.

Bucherer, H. T., and Barsch, H., 162.

Damiens, A. See Lebeau, P. Daniels, A. L., and Stearns, G., 197. Daniels, F., 108.

Danilov, V. A. See Smorodincev, J. A.

Darmois, E., 133.

Dauvillier, A., 199.

Davey, W. P., 107, 112.

Davis, D. S. See Calingaert, G.
De Coulon, A. See Vlès, F.
Deines, O. von, 138.

Delaby, R., and Janot, M. M., 165.
Denis, W., and Leche, S., 212.
Descamps, R. See Cotton, A.
Desgrez, A., and Meunier, J., 191.
Desgrez, A., Moog. R., and Gabriel,
(Mme.) L., 195.
Dhar, N. R., 123.
Diamant, E.

See Erben, F. X.

Dickhäuser, E. See Ohle, H

Dilthey, W., and Berres, C., 177.

Dilworth, H. M.

See Boswell, M. C.

Dixon, A. L. See Rodebush, W. H.
Dobbrow, M. A. See Carr, E. P.

Dobson, G. M. B., and Harrison, D. N., 140.

Dokan, S. See Michaelis, L.

Domontovitsch, M. K., and Sarubina,
O. V., 125.

Donati, A. See Porlezza, C.
Donker, H. J. L. See Kluyver, A. J.
Dorcas, M. J. See Osterhout, W. J. V.
Dorgelo, H. B., 101, 109.

Dorier, P. C. See Bert, L.
Dox, A. W., 146, 180.

Dreblow, E. S. See Simeon, F.
Druce, G., 138.

Drummond, J. C., Channon, H. J.,
and Coward, K. H., 206.
Drummond, J. C., Coward, K. H., and
Handy, J., 207.

Dubrisay, R., 119.

Dudley, H. W., and Rosenheim, O., 194.

Du Mond, J. W. M., 103.

Dutt, S., 174.

Duval, M., and Prenant, M., 191.

Du Vigneaud, V., and Karr, W. G., 195. Dziewoński, K., and Lityński, T., 160. Dziewoński, K., and Suszko, J., 161.

EBERT, W. See Strecker, W.
Edwards, R. S., and Worswick, B., 118.
Eggert, J., [with Wachholtz, F., and
Schmidt, R.], 135.

Egnér, H., 128.

Ehrenberg, R., 192, 193, 203.
Ehrlich, A. See Bettzieche, F.
Elion, L., 165.

Ellinghaus, J., Müller, E., and Steudel,
H., 197.

Ellis, N. R., and Hankins, O. G., 197.
Elvins, O. C. See Morgan, G. T.
Engelhardt, W., 193.

Erben, F. X., Philippi, E., and
Schniderschitz, N., [with Sporer, F.,
and Diamant, E.], 188.
Eriksson, G., and Hulthén, E., 107.
Ets, H. N. See Williamson, C. S.
Euler, H. von, 208.

Euler, H. von, and Myrbäck, K., 205.
Euler, H. von, and Ölander, A., 129.
Evans, C. L., 194.

Evans, W. L., and Buchler, C. A., 149. Evans, W. L., Buchler, C. A., Looker, C. D., Crawford, R. A., and Holl, C. W., 148.

Evans, W. L., and Holl, C. W., 149.

FABRE, R., and Simonnet, H., 201.
Fairbourne, A., and Foster, G. E., 144.
Faulkner, I. J. See Lowry, T. M.
Fearon, W. R., 207.

Ferenczy, J. See Bodnar, J.
Fernandes, L., 140.

Ferrier, G. S. See Cumming, W. M.
Fikentscher, H. See Weinland, R.
Finzi, C., 186.

Fischer, H., and Hilger, J., 189. Fischer, H., Hilmer, H., Linder, F., and Pützer, B., 196.

Fischer, H., and Nenitzescu, C., 178.
Fischer, H., and Wallach, B., 178.
Fleury, P., 202.

Foley, A. L., 109.

GABRIEL, (Mme.) L. See Desgrez, A.
Gäde, W., and Straub, W., 211.
Gagarin, R. F. See Löwenbein, A.
Gardner. See Richet, C.
Garre, B. See Tammann, G.
Garrison, A., 130.

Gauerke, C. G. See Marvel, C. S.
Gauntlett, J. M., and Smiles, S., 164.
Gehrcke, E., 101.

Gelissen, H. See Böeseken, J.
Gentner, R. See Gutbier, A.
Georg, A. See Pictet, A.
Gerlach, W., 114.

Germann, A. F. O., and Birosel, D. M., 142.

Ghigi, E. See Plancher, G.

Gilchrist, H. S., and Purves, C. B., 153.
Gilman, E. See Hahn, D. A.
Giribaldo, D., 125.

Glass, S. W. See Forbes, G. S.
Glassmann, I. B., 192.

Glasstone, S., and Biggs, E. J., 126.
Glaubach, S., and Pick, E. P., 200.
Godchot, M., and Bedos, P., 164, 169.
Godnev, T. N., 183.

Godnev, T. N., and Naryschkin, N. A., 183.

Gönningen, F. See Remy, R.
Goldblatt, M. W., 198.
Goldscheider, I. See Mendel, B.
Gollwitzer-Meier, K. See Straub, H.
Gomberg, M., 111.

Goodbody. See Richet, C.
Gorbatschev, A., 119.
Gorodisskay, H., 194.

Gorr, G., and Wagner, J., 189.
Grandsire, A. See Colin, H.
Grebenshchikov, J. V. See Puskin,
N. A.

Green, J. B. See Petersen, M.
Greene, M. C. See McClure, C. W.
Greenwald, I., and Gross, J., 206.
Grigorieva, V. F. See Pigulevski,
G. V.

Groll, H. M. See Smith, A. H.
Gross, J. See Greenwald, I.
Gross, P., and Halpern, O., 129.
Grossmann, V. See John, H.
Grube, G., and Motz, G., 131.
Günther, P., and Strauske, I. N., 111.
Guggenheimer, S. See Skraup, S.
Gutbier, A., Kautter, T., and Gentner,
R., 121.

Gutbier, A., and Leutheusser, E., 121.
Gutbier, A., and Ottenstein, B., 121.

Hanuš, J., Jilek, A., and Lukas, J., 141. Harada, Y. See Brugsch, T.

Harrison, D. N. See Dobson, G. M. B. Hartl, K. See Starlinger, W. Hartwell, G. A., 207.

Havard, R. E., and Reay, G. A., 192. Havighurst, R. J., 114.

Haworth, R. D., and Lapworth, A., 161.

Haynes, L. P. See Howe, J. L.
Heller, J., 197.

Hendricks, S. B., and Pauling, L., 113.
Herz, W., 110, 117.
Herzog, R. O., 122.

Hess, A. F., Weinstock, M., and
Sherman, F., 207.

Hetterschlj, C. W. G., and Hudig, J., 139.

Hevesy, G. von, 111.

Hey, D. H. See Butler, J. A. V.
Hey, K. See König, W.
Heyrovský, J., 138.

Hibbert, E. See Knecht, E.

Hilarovicz, H. See Mozolovski, W.
Hildebrandt, F. M., 142.

Hilger, J. See Fischer, H.
Hill, E. L. See Marvel, C. S.
Hilmer, H. See Fischer, H.

Hinshelwood, C. N., and Burk, R. E.,

Hooft, F. van 't. See Kluyver, A. J. Hopkins, E. F., and Wann, F. B., 204. Horsters, H. See Brugsch, T.

Houston, B., and Johnson, T. B., 164. Howe, J. L., and Haynes, L. P., 138. Howe, J. L., and Mercer, F. N., 138. Hoyt, F. C., 106.

Hrynakovski, C., and Rychter, A., 211. Hudig, J. See Hetterschlj, C. W. G. Hugel, G., 183.

Hugershoff, H., 156.

Hugh, W. E. See Butler, J. A. V.

JACQUOT, R., and Mayer, A., 208. Janot, M. M. See Delaby, R. Jennings, E. de W. See Wheeler, A. S. Jensen, F. W., and Upson, F. W., 149. Jilek, A. See Hanuš, J.

Johansson, C. H., and Linde, J. O., 112. John, H., [with Grossmann, V.], 179. Johnson, T. B. See Houston, B., and Rugeley, E. W.

Jones, E. See Morgan, G. T.

Jones, G. A. See Carothers, W. H.
Jones, L. W., and Burns, G. R., 155.
Jones, W. N., 135.
Joos, G., 106, 111.
Joseph, A. F., 132.

Joseph, A. F., and Oakley, H. B., 132.
Journiaux, A., 116.
Jungermann, C. See

L. T.

Sabalitschka,

Jurany, H. See Koenigs, E.

KAJDI, L., 108.

Kallmann, H., and Bredig, M., 104.
Kallmann, H. See also Fränz, H.
Kalsing, H. See Tammann, G.
Kameyama, N. See Azuma, R.
Kar, K. C., 118.

Karczag, L., and Roboz, P., 120.
Karpen, N. V., 124.

Karr, W. G. See Du Vigneaud, V.

Kautter, T. See Gutbier, A.

Kawai, S. See Michaelis, L.
Keeler, H. R. See Cullen, G. E.
Kellett, R. E. See Morgan, G. T.
Kiesel, A., 204.
Kimura, K., 144.
Kimura, K. See also Shibata, Y.
King, H., and Murch, W. O., 186.
King, H. See also Balaban, I. E.
Kiprianov, A. See Krasyski, K.
Kirchner, F., 103.

Kishner, N., 167.

Kiuti, M., 103.

Klotz, L. J. See Coons, G. H. Kluyver, A. J., Donker, H. J. L., and

Hooft, F. van 't, 203.
Knaffl-Lenz, E., 132.
Knaus, H. H., 205.

Knecht, E., and Hibbert, E., 149.
Kobel, M. See Neuberg, C.
Koblic, O., 105.

Koch, J. A. See Cretcher, L. H.
Kochmann, H., 212.

König, W., [with Hey, K.], 175.
König, W., and Buchheim, R., 178.
Koenigs, E., Friedrich, H.,
Jurany, H., 178.

and

Langseth, A., 116.

Lapworth, A.

See Haworth, R. D.

Larsen, E. S., and Wherry, E. T., 143.
Lasarev, P., 116.
Lasch, F., 201.

Lasuitzki, A. See Rona, P.

Lattès, (Mme.) J. S., and Fournier, G., 105.

Laubender, W., 199.
Laves, O., 191.
Lavrov, D. M., 201.

Lebeau, P., and Damiens, A., 139.
Leber, A. See Manchot, W.
Leche, S. See Denis, W.
Lee, J. van der, 179.
Legendre, R., 143.

Leibowitz, J. See Pringsheim, H.
Lemme, G. See Rojahn, C. A.

Lemon, H. B., and Blackburn, C. M., 109.

Leopold, G. See Foote, H.
Lesser, R., and Sad, S., 167.
Leube, E. See Vieth, H.
Leutheusser, E. See Gutbier, A.
Levalt-Ezerski, M., 120.
Levi, G. R., 114.

Lewis, J. H., and Wells, H. G., 193.
Liang, B., and Wacker, L., 207.
Lind, S. C., 143.

Linde, J. O. See Johansson, C. H.
Linder, F. See Fischer, H.
Lippmann, E. O. von, 165.
Lityński, T. See Dziewoński, K.
Loeper, M., and Mougeot, A., 201.
Löwenbein, A., and Gagarin, R. F., 168.
Löwenbein, A., and Ulich, G., 171.
Long, C. N. H., 190.

Looker, C. D. See Evans, W. L.
Loomis, A. G., and Walters, J. E., 141.
Lorber, L., 211, 212.

Lorenz, R., 126.

Lovett, T. See Perman, E. P.
Lowry, T. M., and Faulkner, I. J., 148.
Lowry, T. M., and Singh, B. K., 110.
Lukas, J. See Hanuš, J.

Lumière, A., and Couturier, H., 193.
Lunde, G. See Barth, T.
Lunn, E. G. See Hogness, T. R.

MAASS, O., and Sivertz, C., 131.
McCance, R. A., 203.

McClure, C. W., Vance, E., and Greene,
M. C., 194.

McCullough, M., and O'Neill, F. I.,

192.

McCurdy, W. H., 101.

Mayer, A., and Plantefol, L., 208.
Mayer, A. See also Jacquot, R.

Mehta, M. M., 209.

Meitner, (Frl.) L., 106.

Meitner, (Frl.) L. See also Hahn, O.

Mendel, B., and Goldscheider, I., 212.

Mendler, A. M. See Terroine, E. A.

Menschel, H., 194.

Menzel, A. See Vanino, L.

Mercer, F. N. See Howe, J. L.
Merritt, E., 115.

Meunier, F., 130.

Meunier, J. See Desgrez, A.

Michaelis, L., and Dokan, S., 120.
Michaelis, L., and Fujita, A., 120.
Michaelis, L., and Kawai, S., 192.
Michaux, H. See Randoin, L.
Michel-Durand, 208.

Miethe, A., and Stammreich, H., 119.
Mihalovics, G. See Csapo, J.

Milaan, J. B. van, 102.

Miller, W. B., and Perkin, A. G., 174.
Mills, W. H., and Raper, R., 186.
Mills, W. H., and Warren, E. H., 178.
Milne, E. A., 105.

Mirsky, A. E. See Anson, M. L.
Mizutani, M., 125.

Mond, R., and Netter, H., 192.
Mondain-Monval, P., 127.
Moog, R. See Desgrez, H.
Moore, E. S., 143.
Moore, H. R., 105.

Morgan, G. T., [with Corby, F. J.,
Elvins, O. C., Jones, E., Kellett,
R. E., and Taylor, C. J. A.], 188.
Morgan, G. T., and Elvins, O. C., 188.
Morgan, G. T., and Holmes, E., 148.
Morrell, R. S. See Adam, N. K.
Motz, G. See Grube, G.

Mougeot, A., and Aubertot, V., 201.
Mougeot, A. See also Loeper, M.

Mozolovski, W., and Hilarovicz, H., 202.

Mühlendahl, E. von, See Biltz, W.
Müller, C., 109.