Ixviii Journal of Comparative Neurology. 



duces a perfectly distinct variety of irritation through the medium of an 

 indifferent nerve upon the cerebrum. 



The intensity of a temperature sensation does not correspond di- 

 rectly with the kinetic energy of the motion but on five other factors; i, 

 the size of the surface, 2, period of irritation, 3, tliickness, 4, conductiv- 

 ity, and 5, temperature of the skin. Pathological data show that the 

 temperature sense is to a certain extent independent of the other senses, 

 being nearest related to pain. Irritation of a moderately sensitive skin 

 with — 10° C exhibits an interval of two-tenths of a second between pres- 

 sure and temperature sensation, with a temperature of -)- 40° C, six-tenths 

 second. There is no evidence of a specific energy of the temperature 

 nerves. 

 Professional Morality. 1 



Contrary to our usual custom, we call attention to a work not directly 

 in line of this Journal, because a perusal of this interesting and well 

 written volume reveals the fact that those professional maxims which 

 the experience of generations of medical practitioners has proven most 

 essential to success, are wonderfully like the universal canons of morality 

 and the dicta of practical experience in all professions. No one, whether 

 a member of a profession or not, can fail to profit by the perusal of a 

 book equally simple and sagacious. It is very satisfactory to read the 

 uncompromising rebuke to the (too numerous) class of physicians who 

 recommend illegitimate sexual intercourse as a remedy for a variety of 

 diseases and it may be hoped that society may not neglect to provide the 

 sanctions necessary to make it effectual. 



Materi.alism asu Modern Phvsi()i,()(;y of the Nervots System. 2 

 This little book was examined with much interest. It is largely de- 

 voted to a vigorous exposition of the inconsistencies of the positions of 

 Professors Huxley and Romanes, particularly in claiming to recognize the 

 independent existence of consciousness and thus avoiding materialism, 

 while, as the author claims, soon returning to it as the only scientific po- 

 sition jiossible. We are unable to see that our author assists us out of 



1. D. W. Catheli., M. I). Hook on the Pliysiciaii Himself, anil Thing's that 

 Concern his Reputation and Success. Tenth Edition (Author's Last Revision). Royal 

 Octavo, IMS pages. Price, po.st-paid, fl.OO, net. Philadelphia: The F. A. Davis A- Co. 

 Publishers, 1231 Filbert Street. 



:.'. William H. Thompson, (i. P. Putnam's .Sons, New York, ls!i2. 



