1892.] MICROSCOPICAL JOURNAL. 173 



years since, when he came to Chicago, and identified himself with 

 the Mcintosh Galvanic Faradic Company in the manufacture of 

 scientific appliances. 



His practical and ingenious mind was soon interested in 

 mechanical improvements of such instruments as came under his 

 observation, which observation soon extended to a large number 

 and variety of scientific appliances. Among these improvements 

 may be mentioned galvanic batteries, dental instruments, optical 

 lanterns, projectiori microscopes, and microscopical stands. 



Dr. Mcintosh was known in all scientific circles, and was a 

 member of many scientific societies. Among these may be men- 

 tioned the American Medical Association, the American Micro- 

 scopical Society, and the Illinois State Microscopical Society. He 

 was also a member of the committeefor the World's Fair from the 

 American Microscopical Society. He was president and lecturer 

 at the American Dental College of Chicago, and lectured 

 frequently at educational assemblies at Chautauqua, Lake Bluff, 

 and elsewhere. 



His death occurred ^Slarch i, while engaged in a series of lec- 

 tures at the Chautauqua assembly at Fumale, in Florida. Per- 

 sonally and socially the Doctor was genial and companionable. 

 He was generous in his assistance, an assertion nearly every 

 member of this society can substantiate. He was never too busy 

 or too weary to give his assistance or advice to any of his associ- 

 ates who came to him. 



He died in the prime of life, with a splendid record of com- 

 pleted work, together with many plans and purposes into which 

 he had entered, and some of which will yet ripen into fruitage 

 through others. 



Resolved, That in the death of L. D. Mcintosh the Illinois 

 State Microscopical Society has lost one of its most esteemed 

 members. 



In the prosperity of its purposes he was earnestly interested, 

 and on many occasions generously contributed his valued serv- 

 ices. During his membership, his impaired health, which was 

 unequal to tlie great demands upon it, prevented him from taking 

 so active a participation in our work as he wished and for which 

 he was so well fitted. 



In the varied lines of optical work, he has left a record of val- 

 uable effort, and we deeply regret that he was taken away in the 

 prime of his accomplishment. 



Be it also resolved^ That a copy of these resolutions, together 

 with accompanying sketch of Dr. Mcintosh, be spread upon the 

 minutes of this society, and a copy also be presented to the 

 American Microscopical Journal, and a further copy be fur- 

 nished to his family. 



Dr. Justin R. Y\.Q.y&^.— Resolved, That the Illinois State 

 Microscopical Society greatly deplores the loss of Dr. Justin R. 



