WALKER PRIZES IN NATURAL HISTORY 



By the provisions of the will of the late Dr. William Johnson Walker two 

 prizes are annually offered by the Boston Society OP Natural History for the 

 best memoirs written in the English language, on subjects proposed by a Committee 

 appointed by the Council. 



For the best memoir presented a prize of sixty dollars may be awarded ; if, how- 

 ever, the memoir be one of marked merit, the amount may be increased to one 

 hundred dollars, at the discretion of the Committee. 



For the next best memoir a prize not exceeding fifty dollars may be awarded. 



Prizes will not be awarded unless the memoirs presented are of adequate merit. 



The competition for these prizes is not restricted, but is open to all. 



Attention is especially called to the following points : 



1. In all cases the memoirs are to be based on a considerable body of original 

 and unpublished work, accompanied by a general review of the literature of the 



2. Anything in the memoir which shall furnish proof of the identity of the 

 author shall be considered as debarring the essay from competition. 



based upon researches made directly in competition for the prizes. 



4. Each memoir must be accompanied by a sealed envelope enclosing the 

 author's name and superscribed with a motto corresponding to one borne by the 

 manuscript, and must be in the hands of the Secretary on or before April 1st of the 

 year for which the prize is offered. 



study of one (or several ) species of plants with respect to leaf variation. 5. Fertiliza- 

 tion and related phenomena in a phenogamous plant. 6. What proportion of a plant's 

 seasonal growth is represented in the winter bud ? 7. A physiographic study of the 

 forms and processes discoverable along a varied shore line. 8. A problem in 

 structural geology. 9. A study of one or more geological horizons with a view to 



A. geographic study of a district of varied features, presented 



>f a thallophyte, with special reference to sporogenesis. 6. Co 

 wledge of response in plant*. 7. The factors governing orien tati 



GLOVER M. ALLEN, Secretary 



