144 GENETICS [Bot. Absts. 



986. Coulter, Merle C. Chlorophyll inheritance. [Rev. of: Ikeno, S. Studies on the 

 hybrids of Capsicum Annuum. II. On some variegated races. Jour. Genetics 6: 201-229. 

 PI. 8, fig. 1-2. 1917.] Bot. Gaz. 67: 95-96. Jan., 1919. 



987. Coulter, Merle C Analysis of quantitative variation. [Rev. of: Brotherton, 

 Wilber, and H. H. Bartlett. Cell measurement as an aid in the analysis of quantitative 

 variation. Amer. Jour. Bot. 5: 192-206. 1918. (See Bot. Absts. 1, Entry 865.)] Bot. Gaz. 

 67: 100. Jan., 1919. 



988. Coulter, Merle C. Hybrid vigor. [Rev. of: Jones, D. F. The effects of breeding 

 and cross-breeding upon development. Connecticut Agric. Exp. Sta. Bull. 207. 100 p., 12 

 pi. New Haven, 1918.] Bot. Gaz. 68: 150-151. Aug., 1919. 



989. Coulter, Merle C. A corn pollinator. Bot. Gaz. 68:63-64. 1 fig. July, 1919.— 

 For artificial pollination of corn an ordinary thistle tube is stoppered in such manner as to 

 permit operator to blow through the apparatus. Pollen is placed in bulb and end of stem, 

 bent at right angles, is inserted in a small aperture cut in end of protecting bag placed over 

 silks. By blowing into apparatus, the pollen is thoroughly scattered through the mass of 

 silks. End of the bag is tben folded over, thus sealing aperture, the fold being made secure 

 by a paper clip. Main advantage lies in possibility of applying pollen without necessity of 

 exposing silks. — L. H . Smith. 



990. Danforth, C. H. Evidence that germ cells are subject to selection on the basis of 

 their genetic potentialities. Jour. Exp. Zool. 28:385 — 412. July 5, 1919. — Breeding experi- 

 ments with poultry demonstrate selective effect of inhalation of alcohol upon different types 

 of germ cells. The alcoholized heterozygote — brachydactylous, polydactylous, white, — was 

 mated to triple recessive, — normal, colored. Control consisted of eggs of same birds before 

 and after period of treatment. Brachydactyly appeared in 39 per cent of controls, but in 

 48.2 per cent during period of treatment. Variations in controls were correlated with similar 

 variations during alcoholization. Polydactyly showed no evidence of being affected unless 

 treatment was very intensive. Dominant white was not affected. Idiosyncracies occur in 

 gametic ratios under normal conditions; — as in brachydactyly, 39 per cent from heterozygote 

 instead of 50 per cent. — P. W. Whiting. 



991. Davenport, C. B. [Rev. of Conklin, Edwin Grant. Heredity and environment 

 in the development of man. 2nd ed., 550 p. Princeton University Press: Princeton, 1918.] 

 Mental Hygiene 3:324. April, 1919. — Points out that in the "matter of determinism and 

 responsibility Conklin is inclined to take a middle ground," but suspects that the author's 

 conclusions of this subject "are influenced by non-biological considerations." Reviewer 

 thinks freedom is even more limited than Conklin cautiously concedes. Inhibitions can be 

 cultivated if their germs are present, but not otherwise. "The capacity for inhibitions may 

 be quite as automatic and as instinctive as the instinct itself." — G. H. Shull. 



992. Davis, Robert L. Plant breeders' envelope. Jour. Heredity 10: 168-169. Fig. 6. 

 April, 1919. — An illustrated description of an envelope, made of oiled paper, adapted to 

 covering delicate flowers during hand-pollination. — M. J. Dorset/. 



993. Edmonds, M. E., and P. Sargeant. Variability in plants. Gard. Chron. 65:299. 

 June 14, 1919. — Note is made of Fuchsia plant which developed a shoot bearing three leaves 

 at each node. Commentor notes that the variation is not particularly uncommon, nor of 

 important biological or horticultural value. [See also Bot. Absts. 3, Entry 1021.] — C. E. 

 Myers. 



994. Fairchild, David. Present condition and opportunity of the American Genetic 

 Association. Jour. Heredity 10: 65-67. 1919. — An address before the annual meeting of the 

 American Genetic Association in which emphasis is placed upon the necessity of getting to 

 the public mind a correct conception regarding the inheritance of acquired characters. It is 

 pointed out that many important situations in the national life can be corrected in this way. — 

 M. J. Dorsey. 



