237 



Mendel's theory is preceded by a brief biographical note on its 

 author. In this edition some of the newer developments, such 

 as Bateson's " Presence and Absence Hypothesis," the newer 

 conception of " reversion," and the phenomena of " dihybridism," 

 supplanting the older conceptions of synthesis and the compound 

 allelomorph, are included, bringing the treatment quite up to 

 date. The statement of the general theory is clear and inter- 

 esting, its practical bearings are indicated, and in a "Note" at 

 the end directions are given for those who may wish to repeat 

 Mendel's experiments. The seven diagrams are specially helpful. 



It seems unfortunate that a work, otherwise so admirable, 

 should be marred by a botanical morphology long since aban- 

 doned. Thus, on pages i6, 17, and 82, the stamens are referred 

 to as the " male" and the pistil as the "female" organs of the 

 flower. On page 19 the pollen-grain is described as a " minute 

 male cell " and homologized with the spermatozoon of animals ; 

 and again, on page 20, the zygote is said to develop into the 

 adult organism by " a process of repeated nuclear division," 

 omitting cell-division entirely. 



With the exception of these minor points, it seems difficult 

 to imagine how the work could have been done much better. 

 Teachers, especially, should welcome the book most heartily. 



C. Stuart Gager. 



PROCEEDINGS OF THE CLUB 

 October 30, 1907 



The meeting was held in the Museum Building of the New 

 York Botanical Garden. The Club was called to order by the 

 secretary at 3:55 o'clock, and Dr. John Hendley Barnhart was 

 elected chairman. Twenty-two persons attended. 



After the reading of the minutes for October 8, 1907, the fol- 

 lowing names were proposed for membership : 



Mr. F. E. Fenno, Nichols, N. Y. ; Mr. Morris Friedman, 2874 

 Briggs Ave., Bronx, N. Y. City; Miss Lillian Belle Sage, 341^ 

 East 1 2th St., N. Y. City. 



The question of omitting the regular meeting for November ij 



