22. — The Interpretation of Nature. By C. Lloyd Morgan, LL.D., 

 F.R.S. Crown 8vo. Net, $1.25. 



Dr. Morgan seeks to prove that a belief in purpose as the causal reality of which 

 nature is an expression is not inconsistent with a full and whole-hearted acceptance of 

 the explanations of naturalism, 



23 — Mosquito Life. The Habits and Life Cycles of the Known Mos- 

 quitoes of the United States ; Methods for their Control ; and Keys for 

 Easy Identification of the Species in their various Stages. An account 

 based on the Investigation of the Late James William Dupree, Surgeon- 

 General of Louisiana, and upon the original observations by the Writer. 

 By Evelyn Groesbeeck Mitchell, A.B., M.S. With 64 Illustra- 

 tions. Crown 8vo. Net, $2.00. 



This volume has been designed to meet the demand of the constantly increasing 

 number of students for a work presenting in compact form the essential facts so far made 

 known by scientific investigation in regard to the different phases of thio, as is now con- 

 ceded, important and highly interesting subject. While aiming to keep within reasonable 

 bounds, that it may be used for work in the field and in the laboratory, no portion of the 

 work has been slighted, or fundamental information omitted, in the endeavor to carry 

 this plan into eSect, 



24. — Thinking, Feeling, Doing. An Introduction to Mental Science. 

 By E. W. Scripture, Ph.D., M.D., Assistant Neurologist Columbia 

 University, formerly Director of the Psychological Laboratory at Yale 

 University. 189 Illustrations. 2d Edition, Revised and Enlarged. 

 Crown 8vo. Net, $1.75. 



" The chapters on Time and Action, Reaction Time, Thinking Time, Rhythmic Action, 

 and Power and Will are most interesting. This book should be carefully read by every 

 one who desires to be familiar with the advances made in the study of the mind, which 

 advances, in the last twenty-five years, have been quite as striking and epoch-making as 

 the strides made in the more material lines of knowledge." — your. Anter. Med. Ass' n, 

 Feb. 22, 1908. 



In preparation: 



The Invisible Spectrum. By Professor C. E. Mendenhall, University 

 of Wisconsin. 



The Physiology and Hygiene of Exercise. By Dr. G. L. Meylan, 

 Columbia University. 



Other volumes to be announced later. 



