No. 1, July, 1920] PHYSIOLOGY 221 



1464. OsBOBNB, T. B., \m> A. J, W \J DM '.'• Extraction and concentration of the water 

 soluble vltamlne from brewers' yeast. Jour. Biol, Chem. 40: '-'i^', 394. 1919. An extrad 

 obtained containing less than one-fifth of the yeas) solidi and nearly all of the pater-soluble 



\ it. imine. — G. />. Bigg. 



Il<>."). I'm.miu, L, 8., am> H. I-. Ki.\ir nit. Relation of plant carotinoids to growth, 

 fecundity and reproduction of fowls. Jour. Biol. Chem. 39: 299-312. I'll. 1919. They el 

 pigment of t lie yolk of hen's eggs is chemically idenl teal with one of t he xanthophyU group of 

 plant carotinoids. The amount <>f xanthophyU in egg yolk. hi. ..id serum and body fit of •. 

 fowl is dependent upon the union nt of xant hophyll in the food eaten. The natural yellow pig- 

 ment of fow Is which is deli veil from t he \:mt 1 1 < » j < 1 1 y II of t lie fond Deal no import. -in t relation 



to growth or to the fnnet ious of feeundity and reproduction, al least for one generation. — 0. 

 B. Iiigg. 



1466. Palmer, L. S., and H. L. rvEMPBTBB. The physiological relation between fecundity 

 and the natural yellow pigmentation of certain breeds of fowls. Jour. Biol. < hem. 39: 313 



? ;>/. 1919. — The yellow pigment in shanks, e:ir lodes, and beaks of certain fowls such as leu- 

 horns and others is due to the presence of xanthophyU in the food. These partf lose their 

 yellow color when the fowl is fed on food that is free from xant hophyll. The yellow pigment 

 fades from these parts during fecundity because of the deflection of the normal path of the 

 excretion of the xanthophyU from these parts of the skin to the egg yolk. The pigmenl in 

 the parts of the skin mentioned is largely in granular form. — 0. li. Bigg. 



1467. Palmer, L. S., and H. L. Kbmpster. The influence of specific feeds and certain 

 pigments on the color of the egg yolk and body fat of fowls. Jour. Biol. Chem. 39: 331 337, 

 1919. — XanthophyU, fed in the form of yellow corn, has an immediate effect on the adi] 

 tissue and visible skin parts of fowls of the type of white leghorns. Carotin and the orange- 

 yellow pigment of annatto seed are without influence on the color of the adipose t issue of poul- 

 try. Yellow corn and green feed are rich in xanthophyU. A little of this pigment is found in 

 hemp seed, barley, gluten feed, and red corn. Wheat, oats, cotton-seed meal, and rape Beed 

 contain negligible quantities of xanthophyU. — G. B. Rigg. 



1468. Patschovsky, Norbert. Uber Nachweis, Lokalisierung und Verbreitung der Ox- 

 alsaure (gelosten Oxalate) im Pflanzenorganismus. [Occurrence, localization and distribution 

 of oxalic acid (dissolved oxalates) in the plant.] Ber. Deutsch. Bot. Ges. 36: 512 -51v 1918. — 

 Calcium salts, such as the nitrates or chlorides which are used to determine the presence of 

 dissolved oxalic acid in the plant cell, have the disadvantage that, in the precipitation of the 

 calcium oxalate, tannins are also precipitated and hide the calcium salt. In ferrous sulphate. 

 acidified with acetic acid, a reagent is found which precipitates the oxalic acid as lemon yellow 

 ferro crystals, and at the same time imparts a blue or greenish color to the tannin. 'I he 

 reagent can be applied to microscopic sections directly or is allowed to 1"' absorbed by the 

 plant before sectioning. In the latter case it is necessary to use a relatively high concenl 

 tion of the iron salt if the crystals are to be formed inside the cells. By using ferrous sul- 

 phate as a reagent, the occurrence and distribution of calcium oxalate and tannin was stud 



in a large number of plants. — Ernst Artschwagi . 



1469. Pbingsheim, Hans, and Hans Magnus. Uber den Acetylgehalt des Lignins. 

 [Acetyl content of lignin.] Zeitschr. Physiol. Chem. 105: 179-186. 1919.— When wood or straw- 

 is treated with sodium hydrate in the cold all the acetic acid liberated is derived from the 

 lignins of these materials. When these materials are boiled with sodium hydrate either under 

 pressure or otherwise most of the acetic acid formed is derived from the lignins, but a small 

 part is derived from the cellulose, and none from the pentoses. The lignin of the white beech 

 yields about 37.85 per cent of its weight of acetic acid and the lignin of conifer wood aboul i 

 per cent. — William Crocker. 



1470. Rtjedigeb, E. II. Exclusion of air in the cultivation of the Gonococcus. Jour. 

 Infect. Diseases 24: 376-378. 1919.— The following medium is recommended for the isolation 



