OF ARTS AND SCIENCES. 541 



In 1876-77, two new electives were added, — namely, an advanced 

 coui-se in Inorganic Chemistry, and a course in Crystallography and 

 the Physics of Crystals, the second of these subjects having appeared 

 for the first time as a half course in 1868-69. In 1886-87 the ad- 

 vanced course in Inorganic Chemistry was more completely defined 

 as including Molecular Weights and Volumes, Thermo-Chemistryy 

 and Specific Refractive Power. This course, thus introduced by 

 Professor Cooke, has to-day a growing importance. In 1892-93, at 

 the age of sixty-five, Professor Cooke undertook a new elective 

 course in Chemical Philosophy and the History of Chemistry. This 

 was the last addition he made to the series of elective courses he had 

 successively introduced, the greater part of which he had delivered 

 over into the hands of younger men. "We cannot too much admire 

 the intellectual vitality which enabled him to keep in the van of the 

 onward movement in an extensive department which he had himself 

 filled with younger teachers full of zeal and ambition. 



The picture of Professor Cooke's influence at the head of the 

 Chemical Department down to 1880, would be incomplete without an 

 enumeration of the names of the young men who served as his labora- 

 tory assistants during the first thirty years that he held the professor- 

 ship. Three of these gentlemen died young ; but the following 

 survive : — 



Professor Frank H. Storer, 

 President Charles W. Eliot, 



Professor William H. Pettee, of the University of Michigan, 

 Professor Charles L. Jackson, 

 Professor Henry B. Hill, 



Professor Charles E. Munroe, of Washington, 

 Professor William Elder, of Waterville, 

 Professor Frank A. Gooch, of Yale University, 

 Professor M. E. Wads worth. Head of the Michigan Mining School, 

 Professor Charles F. Mabery, Professor in the Case School of Ap- 

 plied Science of Cleveland ; 



and four gentlemen who have all been devoted to technical Chemistry, 

 — namely, Messrs. Charles S. Homer, William D. Philbrick, John 

 F. White, and Harry Blake Hodges- All these gentlemen wei-e em- 

 phatically Professor Cooke's assistants. A large number of younger 

 men have been trained as assistants in Boylston Hall during the last 

 fourteen years ; but many of them were brought into little immediate 

 contact with Professor Cooke, because they served in laboratories 



