

WALKER 
PRIZES IN NATURAL HISTORY 

B* the provisions of the will of the late Dr. William Johnson Walker two prizes 
are annually offered by the Boston Society oF NATURAL History for the 
best memoirs written in the English language on subjects proposed by a com- 
mittee 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 : 
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unpublished work, accompanied by a general review of the literature of the subject. 
- Anything in the memoir which shall furnish proof of the identity of the author 
shall ot considered as debarring the essay from competition. 
3. Preference will be given to memoirs showing intrinsic evidence of being based 
upon researches made directly in competition for the prize. 
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. 
Subject for ro0r: 
Monograph on any problem connected with or any group belonging to the North 
American fauna or flora. 
Subjects for 1902: 
- Nuclear fusions in plants. 
- The fate of specific areas of the germ of chordates, as determined by local 
Mec on. 
- The reactions of organisms to solutions, considered from the standpoint of the 
chemical theory of dissociation. 
C. F,. BaTCHELDER, 
Secretary. 
BOSTON SOCIETY OF sii HISTORY, 
BOSTON, MASS., U.S 









