April, 1920] PHYSIOLOGY 17.", 



man resumc\] Bot. Notiser 1918: 49-5S. Fig. 1-8. 1918. The of Hi acleumi 



are: H.granatense, II. eminent, H '. villoaum, and H '. pyrenaicum. En all, the pigmei 

 carotin, whieh crystallizes when treated with alcohol or acetone, I'. I. R 



1217. Hackii, Inqo VV. D. Bioelements. The chemical elements of living matter. 

 Jour. Gen. Physiol. 1:429-433. 1919.— A table is given Bhowing the distribution of the bio- 

 elements in some living organisms and food; also, one showing distribution of chemical ele- 

 ments. — J. M. Brannon. 3j 



1218. Hassklbeing, H. Physiology of fungi. [Rev. of: Duggak, B. M., J. W. St.vi.jtY, 

 and H. Schmitz. Studies in the physiology of fungi. Ann. Missouri Bot. I lard. 4: 166-173, 

 279-2S8. 1917.] Bot. Gaz. 67: 102. 1919. 



1219. Hemmi, Fumiwo. On the carbohydrates of the edible tubers of Japan. Jour. Coll. 

 Agric. Hokkaido Imp. Univ. 8: 33-76. 1918. — Six edible tubers of Japan were analysed. In 

 addition to the analyses for water, protein, fat, crude fiber, and nitrogen, the tub 

 carefully analyzed for carbohydrate content, many tests being employed. Starch was m 

 abundant (58 per cent to 71 per cent of dry matter) ; sugar (1.4 per cent to 16.6 per cent I. of 

 the sugars, sucrose and glucose were most abundant, while fructose was present in small 

 amounts in some tubers. Galactan and araban were also found to be present. The tubers 

 of the following species were used: Apios Fortunei Maxim., Colocasia anliquorum Schott., 

 Corydalis ambigua Cham. & Sch., Dioscorea Batatas Decne., Eleocharis plantaginea R. Br., 

 and Helianthus tuberosus L. These include all edible tubers of Japan not previously analyzed. 

 — R. S. Nam. 



1220. Henderson, L. J., Edwin J. Cohn, P. H. Cathcart, J. D. Wachman, and \V. O. 

 Fenn. A study of the action of acid and alkali on gluten. Jour. Gen. Physiol. 1: 459- 

 1919. — The authors venture the conclusion that in systems containing gluten and acid- 

 bases the formation of salts, in accordance with the requirements of the mass law, is the 

 fundamental phenomenon. They introduce the term "salt conductivity" which represents 

 the effect of all other ions than those which may be hypothetically attributed to free Hf'l. 

 Also the term "corrected salt conductivity" is used. This represents the effects of the action 

 of the acid to increase conductivity, aside from the direct effect of the ions arising from those 

 molecules of acid which remain free in the solution. This is compared with the total amount 

 of acid which has disappeared from the solution. In some of the tables this comparison, in 

 the form of a ratio, is designated R. From the tables there is seen to be a rough mcy 

 of the ratio of corrected salt conductivity to combined acid. This does not hold true for lower 

 ranges of acidity. — The authors found that the electrolytes originally present in gluten are 

 sufficient per gm. of gluten to give a conductivity of approximately 200 to 100 cc. of water. 

 From table VII they make the following conclusion: first, the weight of swollen gluten b< 



no relation to the true swelling because of variations in quantity of protein dissolve nd, 



it bears no relation to the H ion concentration, except when quantities of gluten and solution 

 are kept constant; third, the chief factor in determining the weight of swollen gluten is the 

 quantity of protein which has been dissolved away; fourth, the amount of gluten dissolved 

 is greater, the greater the acidity; fifth, true swelling of gluten is greater, the greater the 

 acidity. There seems to be a tendency for the true swelling of gluten to increase as the relative 

 quantity of gluten increases. The viscosity seems to depend on H ion concentration, amount 

 of water and electrolytes present in the swollen mass, and, at times, on the age of the system. 

 T . M. Brannon 



1221. Hudson, C. S., and Shigertj Komatsu. The rotary powers of the amides of several 

 o-hydroxy acids of the sugar group. Jour. Amer. Chem. Soc. 41: 1141-1147. 1919. — See Bot. 

 Absts. 3, Entry 2144. 



1222. Hudson, C. S., and K. P. Monroe. The amide of a-5-mannoheptonic acid. Jour. 

 Amer. Chem. Soc. 41: 1140-1141 1919. 



