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 of 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, however, 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, hut is open to all. It is nevertheless the tradition 

 of the Society that the founder of these prizes intended them more in the nature of encourage- 

 ment to younger naturalists than as rewards for the work of mature investigators. 

 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 In all cases the memoirs are to be based on a considerable body of original and unpublished work, 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. 



3. Although the awards will be based on their intrinsic merits, preference may be given to memoirs 

 bearing evidence of having been prepared with special reference to competition for these prizes. 



4. Each memoir must be accompanied by a sealed envelope inclosing the author's name and super- 

 scribed with a motto corresponding to one borne by the manuscript, and must be in the hands of 

 the Secretary on or before March i of the year for which the prize is offered. 



5. The Society assumes no responsibility for publication of manuscripts submitted, and publication 

 should not be made before the Annual Meeting of the Society in May. 



SUBJECT FOR 1920 AND 1921 



Any subject in the field of Natural History 



BOSTON SOCIETY OF NATURAL HISTORY, Boston, Mass., U.S.A. 



GLOVER M. ALLEN. Secretary 



POSITIONS OF ALL KINDS 



Never was the demand so great for qualified 

 teachers and specialists. For nine years we have 

 given our time and energy to this work. Write for 

 our free literature. State qualifications briefly. 



Co-operative Instructors' Association 



Marion ... Indiana 



A Series of 



Base Maps and Graphs 



Prepared by J. PAUL GOODE 



Professor of Geography in the 

 University of Chicago 



THESE maps are accurate in detail, 

 of highest quality in drawing, being 

 superior to most maps used in books and 

 magazines. They are printed on a fine 

 quality of paper and give excellent results 

 with colored pencil, water color, or ink. 

 Maps come in five sizes from one to forty 

 cents each. 



Write for complete list with prices 



The University of Chicago Press 



Chicago ..... Illinois 



The Geology of 

 Vancouver and Vicinity 



By 



EDWARD M. J. BURWASH 



14 lialf -tones, lo line drawings, and 2 colored maps 



A thorough and authoritative survey of the 

 region, made more interesting by the re- 

 markable photographs, which include a profile 

 of the Grouse Mountain spur, the Lions from 

 Mount Brunswick, a view of Red Mountain 

 from Black Tusk Mountain, Mount Garibaldi 

 from the south, a glacial section from a 

 cutting on Keith Road, and others equally 

 interesting. One colored map shows the 

 topography of Vancouver range and the other 

 is a geological map of Vancouver and vicinity. 



112 pages, paper covers; $1.50, postpaid $j.6o 



The University of Chicago Press 



Chicago - - - Illinois 



