522 Joiinial of Coiiiparative Neurology and Psychology. 



book, of Lotze's lectures and original lectures on the mechan- 

 ism of the brain was a decided novelty in those days. 



In 1889 he began work in earnest on the nervous system- 

 and immediately there appeared a series of papers in rapid suc- 

 cession, some of great length and others mere jottings. The 

 first long paper was published with Professor W. G. Tight in 

 the Denison University Bulletin in 1890, and was entitled "The 

 Central Nervous System of Rodents." This paper contains 

 nineteen double plates and a vast amount of observation; and 

 was designed as a preliminary survey of the field, the plates to 

 form the basis of further detailed observations and correlation. 

 But he soon became convinced that this correlation could best 

 be attempted after a thorough study of several types of lower 

 brains and the series was interrupted. At the time of his break- 

 down in 1894 he was just about to take up again by the degen- 

 eration methods a more thorough study of the mammalian 

 brain. Thus this rodent paper stands now as an unfinished 

 fragment. 



This, however, illustrates well his plan of work, a plan 

 which must be clearly understood in order to put a proper esti- 

 mate on his published researches. He found correlation im- 

 possible and at once saw that only in primitive types could the 

 key be found, and that too not in any one series, but only in the 

 common features of many lower types. Accordingly he un- 

 dertook to examine in rapid succession as material offered a 

 large number of lower brains, taking voluminous notes and 

 publishing the observed data as fast as they were ready. All of 

 this work was fragmentary and much of it contained but little 

 correlation. But the mass of facts gathered and recorded was 

 enormous. He realized that the incessant strain on his eyes 

 could not always be kept up, and planned to accumulate fact 

 as rapidly as possible until failing eyes should impair his effi- 

 ciency in this field. TJien he hoped to review the whole field 

 of vertebrate neurology systematical!)-, using his own observa- 

 tions as the skeleton on which to build by study of literature 

 and further research of his own on critical points, until the whole 

 should take shape as a unity. When he settled in Granville 



