No. 1, August, 1921] GENETICS 37 



and selection are in progress on Nicotiana lahacum and A^. rustica (tobacco), Cicer arietinum 

 (gram), IJibiscns cannabinus (patwa), Carihamns tinctorius (safflower), Dioscorea spp. (yam.), 

 and Oryza saliva (rice). — Chlorosis in Corchorus (jute) is believed to be hereditary; "The 

 facts tend to show that it is possibly a case of maternal inheritance, the disease being passed 

 on through the cytoplasm of the egg- cell." A form of chlorosis common in Cajanus indicus 

 (arhar) apparently behaves siniilarl3\- — A program of work for 1920-21, and a list of publica- 

 tions for the year are given. — Winfield Dudgeon. 



231. IIiusciT. [German rev. of: Tschekmak, A. vox. Uber das verschiedene Ergebnis 

 reziproker Kreuzung von Hiihnerrassen und iiber dessen Bedeutung fiir die Vererbungslehre. 

 (Theorie der Anlagenschwachung oder Genasthenie.) (On the dififerent results of reciprocal 

 crossing of races of domestic fowl and on their significance for the theory of heredity. Theory 

 of weakening of the genes or genasthenia.) Biol. Zentralbl. 37: 217-277. May, 1917.] Arch. 

 Rassen- u. Gesellschaftsbiol. 13: 309-310. 1921. 



232. HoFSTEN, Nils von. Modern arftlighetslara. [Modern genetics.] Svenska siills- 

 kapets for Rashygien skriftserie III-IV. H X 22 cm., 60 p., 23 fig. P. A. Norstedts & Soners 

 forlag: Stockholm, 1920. — A popular essay on some important results. — K. V. Ossian 

 Dahloren. 



233. HoLMBERG, Otto, R. Anteckningar till nya skandinaviska floran. [Notes to a new 

 Scandinavian flora.] — Bot. Notiser 1920: 161-166. 1920. — Some Equisetum hybrids are criti- 

 cally discussed. — K. V. Ossian Dahlgren. 



234. Johansson, K. Was ist unter dem Namen Ulmus montana With. var. nitida Fr. zu ver- 

 stehen. [What is to be understood under the name Ulmus montana With. var. nitida Fr.] Bot. 

 Notiser 1921: 71-73. 2 fig. 1921. — A diagnosis and description of the bastard Ulmus foliacea 

 Gilib X glabra are given. — K. V. Ossian Dahlgren. 



235. JoHNSONj James. Inheritance of disease resistance to Thielavia basicola. [Abstract.] 

 Phytopathology 11: 49. 1921. — Study of crosses between susceptible and resistant varieties 

 have shown that inheritance of resistance, in this instance, does not follow a simple Mendelian 

 ratio. — B. B. Higgins. 



236. Jones, D. F. A parafiine ruler for drawing curves. Science 51: 245. 1920. — Points 

 of desired curve are plotted on paper, placed over smooth board, and slender nails driven in 

 at each point. Flexible strip of whalebone, metal, or bristol-board is bent around nails to 

 fit curve, and held upright by other nails. This furnishes mould for parafiine cast of curve. — 

 Merle C. Coulter. 



237. JoxES, Sarah V. H., and James E. Rouse. The relation of age of dam to observed 

 fecundity in domesticated animals. Jour. Dairy Sci. 3: 260-290. 4 fig. July, 1920.— Data are 

 presented on beef cattle (Hereford and Aberdeen Angus) and sheep (Wisconsin Station flock) 

 to prove that increasing the age of the dam up to a certain limit increases the occurrence of 

 multiple births. Literature is cited to support this conclusion in other species.— The records 

 for the Hereford and Aberdeen Angus breeds are taken from the herd books including the first 

 42 volumes for the Hereford and the first 26 volumes for the Aberdeen Angus. They show, 

 aside from the major thesis, that 4.52 Hereford births per 1000 of herd-book records and 4.11 

 Aberdeen Angus births per 1000 of herd-book records are twins. A total of only 7 triplets 

 and 1 quadruplet are recorded in either breed. — In sheep the multiple births per 1000 are 

 582.91 with 40.20 of these triplets.— /o/m 11'. Gowen. 



238. K., J. [Rev. of: Steinach, E. Verjiingung durch experimentelle Neubelebung 

 der alternden Pubertatsdriise. (Rejuvenation through experimental revitalization of the sen- 

 ile sex glands.) 68 p., 9 pi. Julius Springer: Berlin, 1920.] Endocrinology 5:238. 1921. 

 [See also Bot. Absts. 9, Entry 258.] 



