198 



The Journal of Heredity 



largest of the three, and since then has 

 grown practically erect. (See Fig. 1.) 

 The scars are still plainly visible where 

 the other branches were removed. 

 The tree is budded on rough lemon 

 stock as root sprouts (removed at the 

 time of photographing) clearly show. 

 All of the fruits borne hy this tree are 

 pink-fleshed. 



A number of old orange trees (109) 

 grafted over to this new variety in 1914 

 by Mr. Collins, bore the second year 

 (1916) a few fruits showing the pink 

 flesh and other characteristics of the 

 parent tree. The freeze of 1917 

 destroyed these grafts when in full 

 bloom. Mr. Reasoner, however, has 

 some budded trees of the pink Marsh 

 which were bearing this season, and 

 the fruit was in every way similar to 

 that secured from the parent tree. 



In the pink Marsh grapefruit the 

 flesh itself is pink, a character in which 



it differs from the Foster and from the 

 pink strain of the Marsh described by 

 Mr. Shamel as occurring at Riverside, 

 California. The color of the flesh in 

 midseason (January and February) 

 is a beautiful pink, but later the color 

 fades decidedly, in late March and 

 April being a shade of amber rather 

 than pink. A cross section of this 

 fruit is shown in Fig. 2.^ 



There is considerable evidence in 

 the case of the pink Marsh (as with the 

 Foster) that the mutative influences 

 which result in pigmentation also bring 

 about early maturity of the fruit. 



Crosses have been made by the 

 writer between these two pink varieties 

 in the hope of intensifying and making 

 more permanent the color of the flesh 

 while preserving the desirable size, 

 shape, texture and seedless character 

 of the pink Marsh. 



^ A preliminary examination of a preserved specimen by Dr. Lon A. Hawkins indicates that 

 the coloring matter present is probably not anthocyanin, usually lacking in Citrus fruits, though 

 said to occur in blood oranges. 



The Genetics of Plant Life 



Heredity and Evolution in Plants 

 by C. Stuart Gager, director of the 

 Brooklyn Botanic Garden. Pp. 265, 

 with 113 illus. Philadelphia, P. 

 Blakiston's son and Co., 1920. 



This convenient book is made up 

 principally of chapters reprinted from 

 the author's Fmidamentals of Botany. 



The book begins in the classical way, 

 with the life history of a fern, goes 

 through experimental evolution, takes 

 up the historical phases, and then 

 deals with the evolution of plants 

 from a broad point of view. The 

 strictly genetic sections seem to be 

 hardly up to date. Many of the il- 

 lustrations are particularly good. P. P. 



The New Psychology 



PsYCHOPATHOLOGY, by Edward J. 

 Kempf, M.D. Pp. 762 with 87 illus., 

 price S9.50. St. Louis, the C. V. 

 Mosby Co., 1920. 



In this work, which is intended for 

 the profession rather than for the 

 general reader. Dr. Kempf has put 

 forward a mechanistic explanation 

 of mental processes, which while not 

 perfect ought to be of considerable 

 use. He manifests not only in- 

 difference but hostility to the idea that 

 may be an important factor in the 



causation of mental deviations. Of 

 eugenic interest is his strong con- 

 demnation of the American practice 

 of placing the education of youth 

 mainly in the hands of celibates. 

 The volume consists largely of case- 

 histories, with comments by the 

 author, but an extended introduction 

 and conclusion give a clear and well- 

 organizcfl outline of Dr. Kempf's 

 somewhat extreme point of \'icw on 

 the problems of abnormal psychology. 

 P. P. 



