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 Bostox 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- 

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 and unpublished work, accompanied by a general review of the literature of the 

 subject. 



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. 



5. The Society assumes no responsibility for publication of manuscript 

 submitted. 



SUBJECTS FOR 1908 : 



1. An experimental study of inheritance in animals or plants. 2. A com- 

 parative study of the effects of close-breeding and cross-breeding in animals or plants. 

 3. A study of animal reactions in relation to habit formation. 4. A physiological 

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

 tion and related ohenomena 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 



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

 determining the different conditions obtaining at one time over a large area, as 

 recorded by sediments and fossils. 

 Subjects for 1909: 



the natural relations of inorganic and organic elements. 2. A petrographic study 

 of a district of crystalline rocks. 3. A paragenetic study of a mineral locality. 4. 

 The conditions controlling sexual reproduction in plants. 5. Studies in the life 

 history of a thallophyte, with special reference to sporogenesis. 6. Contribution to 

 our knowledge of response in plants. 7. The factors governing orientation in animal 



Inimals. 9. The activities of the animal bodyto relation to internal secretions. 

 Boston Society of Xatnral History, 

 Boston, Mass., U. S. A. 



GLOVER M. ALLEN, Secretary 



