34 GENETICS [Bot. Absts. 



240. Conklin, Edwin G. Heredity and democracy. A reply to Mr. Alleyne Ireland. 

 Jour. Heredity 10: 161-164. Apr., 1919— See Bot, Absts. 3, Entry 984. 



241. Connors, C. H. Methods in breeding peaches. Proc. Amer. Soc. Hortic. Sci. 14: 

 (1917) 126-127. 1918.— See Bot. Absts. 2, Entry 724; 3, Entry 608. 



242. Crandall, C. A. Apple bud selection: Apple seedlings from selected trees. Illinois 

 Agric. Exp. Sta. Bull. 211 : 181-264. 43 fig. 1918.— Object of this experiment, begun in 1907, 

 was (a) to determine, for purposes of propagation, whether there are differences between large 

 and small buds, between buds produced on different parts of the tree and, (b) to determine 

 what differences there are, if any, between seedlings grown from seed taken from large fruit 

 as compared with those from small fruit borne on same tree. Bud selection experiments 

 were carried on extensively and with great care. Tests were made by means of buds and 

 grafts on seedling stock of mixed apples. In seed bed and nursery there was considerable 

 loss from various causes. The trees were planted 15 X 15 feet in the orchard. Measure- 

 ment in the different selections was taken first on the terminal growths only and later on 

 both the height and width. — Growth of scions and buds selected as noted above was remark- 

 ably similar. In each group there were fluctuations in growth, and there was considerable 

 variation in the comparative growth from year to year. Author concludes from these ex- 

 tensive tests that for purposes of propagation there are no differences between buds of large 

 and small size, between scions of small or large diameter, or between buds from different 

 situations upon the tree. All buds from healthy shoots appeared from these experiments 

 to be of equal value for propagation, even though each tree selected in this way had distinct 

 individuality. As to seedlings from apples of different size, there was in all great reduction 

 in the seed bed and nursery so that at the end of the 6 year period there was one tree for 

 each 17.2 seeds planted. A comparison of the survival value of seedlings from the large and 

 small fruits showed that seedlings from the former were more resistant to adverse conditions 

 and possessed a higher degree of vitality. — M. J. Dorsey. 



243. Darbishire, F. V. Sugar beet seed. Jour. Soc. Chem. Ind. Rev. 38:21. 1919.— 

 See Bot, Absts. 3, Entry 2108. 



244. Davenport, C. B. Heredity of stature in man. Jour. Heredity 9: 295, Nov., 1918. 

 — Stature is end result of a number of independently varying elements. Separate segments 

 of stature are separately inheritable. Study made on 3298 children, 1738 parents and a 

 number of relatives. Offspring of short or very short regress more toward mean than of tall 

 or very tall, indicating that shorts may carry recessive factors for tallness, while tails are 

 homozygous. Segments of stature such as neck, length of torso, thigh, and foreleg are 

 inherited according to same law. Persons of extreme stature tend to marry similar persons. 

 —P. W. Whiting. 



245. Davenport, Charles B. [Rev. of: Downing, Elliot Rowland. The third and 

 fourth generation: an introduction to heredity. 164 P- University of Chicago Press: Chicago. 

 1918. (See Bot. Absts. 3, Entry 248.)] Mental Hygiene 3: 153-154. Jan., 1919. 



246. Davenport, Charles Benedict, assisted by Mary Theresa Scudder. Naval 

 officers; their heredity and development. Carnegie Inst. Washington, Publ. 259. 236 p. 1919. 

 — Part One is devoted to an exposition of the principles of pedigree analysis, with special ref- 

 erence to heritable traits which contribute to success of naval officers. Method of inheritance 

 of special traits is described, and an enumeration of the special traits involved is given. 

 "Sea-lust, or thalassophilia, is almost wholly a male character, apparently much more so than 

 nomadism; quite as much so as the beard. Even among the Polynesians the women are not 

 given to going to sea." From hereditarj- point of view, thalassophilia is a recessive trait. 

 Naval fighters arc chiefly hyperkinetic. In their youth they are shown to have been 

 nomadic, thalassophilic, and adventurous.— Part Two is given up to an analysis of the biogra- 

 phies of sixty-eight famous naval officers, laying particular stress on their juvenile promise 



