SCIENCE-ADVERTISEMENTS 



THE PSYCHOLOGICAL 

 APPROACH 



In the practice of medicine 

 is tiie main theme in 



THE NEW LOGIC 



By CHARLES MERCIER 



Pp. 422 Cloth, $3.00 



This book has grown out of the author's ex- 

 perience as physician for mental diseases in 

 Charing Cross Hospital and examiner in psy- 

 chology in the University of London. 



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THE OPEN COURT 

 PUBLISHING COMPANY 



122 S. Michigan Ave. Chicago 



UNION OF SOUTH AFRICA 



Department of Agriculture 

 Appointment of Assistant Entomologist 



Applications are invited for tlie post of ASSISTANT 

 ENTOMOLOGIST in ttie Department of Aericulture of the 

 Union of South Africa. 



Applicants for the post must have had a College education 

 embracing entomology and allied natural science courses, 

 and must be capable of undertaking investigations of insect 

 problems. Practical experience in economic entomology 

 will be a recommendation. 



The salary attaching to the post commences at £350 per 

 annum and rises, subject to satisfactory service, by annual 

 increments of £20 to a maximum of £450, but in the case of a 

 fully competent man the prospects of promotion to a higher 

 grade are good. In certain districts a local allowance is pay- 

 able in accordance with the Regulations of the Public Service. 



The successful candidate will be required to serve on pro- 

 bation for a period of twelve months and will be expected 

 to acquire a knowledge of the Dutch and English languages 

 within a reasonable period. 



Applications supported by certificatei of birth, health, 

 character, education, previous employment or professional 

 qualifications, and languages will be received by the under- 

 signed not later than April 30, 1913. 



P. J. H. HOFMEYR, 

 Secretary Public Service Commission. 



ELEVENTH EDITION 



THB MICROSCOPE, 



an introduction to Microscopic Methods and to Histology, by 

 Simon Henry Gage of Cornell University. The 11th edition 

 has eight pages of new matter and corrections, otherwise it is 

 like the 10th ed. Price t2.00 postpaid. 



COMSTOCK PUBLISHING CO., Ithaca, N. Y. 



Science and Education 



A Series of volumes for the promotion of scienti£c researcli and educational progress 

 Volume I. The Foundations of Science 



By H. PoiNCARB. Containing the authorized English translation by George Bruce 

 Halsted of "Science and Hypothesis/' " The Value of Science," and "Science 

 and Method." In press. 



Volume II. Medical Research and Education 



By Geokgb Mills Peaece, William H. Welch, C. S. Minot, and other authors. 



In press. 



Volume III. University Control. Now ready. 



Published March, igi3. Pages x+484. Price, $3.00 net 



University Control 



By J. McKben Cattell, Professor of Psychology in Columbia University 

 Together with a Series of Two Hundred and Ninety -nine Unsigned Letters by Lead- 

 ing Men of Science holding Academic Positions and Articles by Joseph Jastrow of the 

 University of Wisconsin, George T. Ladd of Yale University, John J. Stevenson of New 

 York University, J. E. Creighton of Cornell University, J. McKeen Cattell of Columbia 

 University, George M. Stratton of the University of California, Stewart Paton of Prince- 

 ton, John Jay Chapman of New York, James P. Munroe of Boston, and Jacob Gould 

 Schurman of Cornell University. 



QARRISON, N. Y. 



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