NEW BIOLOGICAL BOOKS 



x 95 



LES £QUISETINEES DU QUEBEC. 

 By Frere Marie-Victor in. 



University of Montreal 

 $1.00 Montreal 



6 x 9; xi + 137 (paper) 

 LES GYMNOSPERMES DU QUEBEC. 

 By Frere Marie-Victor in. 



University of Montreal 

 $1.00 Montreal 



6 x 9; xii -f- 147 (paper) 

 SUR UN BOTRYCHIUM NOUVEAU 

 DE LA FLORE AMERICAINE ET SES 

 RAPPORTS AVEC LE B. LUNARIA ET 

 LE B. SIMPLEX. 

 By Frere Marie-Victor in. 



University of Montreal 

 50 cents Montreal 



6 x 9; zz + 3 plates (paper) 

 These papers constitute Nos. 9-1 1 of 

 the contributions from the Botanical 

 Laboratory of the University of Montreal. 

 The first two are systematic floristic 

 monographs, well arranged and carefully 

 done, with good illustrations, dealing 

 respectively with the horse-tails and the 

 gymnosperms of Quebec. The third is a 

 biometric study of three species of Botry- 

 chium, undertaken for the purpose of 

 taxonomically distinguishing them. 



PLANTS OF THE PAST. A Popular 

 Account of Fossil Plants. 

 By Frank H. Knowlton. 



Princeton University Press 

 $3.50 Princeton , N. J. 



6x9; xix + 175 

 The author's purpose was to produce 

 "a work of moderate size, written in 

 non-technical language, that should set 

 forth the salient facts regarding the plants 

 that have clothed the earth from the time 

 when life first appeared down to the 

 present." This purpose has been excel- 

 lently realized. The style is simple and 



straight-forward; the book is beautifully 

 printed and illustrated; and the arrange- 

 ment of the material is well calculated to 

 sustain the interest of the general reader. 

 We commend the book particularly to 

 workers in other fields of science who 

 wish to get a general idea of the present 

 status of palaeobotany, without too much 

 trouble. 



COLORADO PLANT LIFE. 



By Francis Kamaley. University of Colorado 

 $z.oo 6x9; viii + Z99 Boulder 



This volume, in the series of Semi- 

 centennial Publications of the University 

 of Colorado, is a highly successful attempt 

 "to present in simple form some of the 

 larger facts of plant life for the man or 

 woman who is not trained in botany but 

 who wishes to gain an appreciation of 

 nature. Care has been taken to make all 

 statements accurate, and it is hoped that 

 the book will not seem shallow just 

 because it is non-technical." Well illus- 

 trated, charmingly written, and suffi- 

 ciently documented and indexed, the book 

 can be highly recommended to the general 

 reader and to the worker in other branches 

 of science who wants to know something 

 of the vegetation which clothes the 

 earth about him. 



ROOT DEVELOPMENT OF VEGE- 

 TABLE CROPS. 



By John E. Weaver and William E. Bruner. 

 McGraw-Hill Book Co. 

 $4.00 5! x 9; xiii + 351 New York 



This is a companion volume to Weaver's 

 Root Development of Field Crops, already 

 noticed in these columns, and is largely 

 based upon the authors' own investi- 

 gations. Thirty-three separate chapters 





