THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



VOL. XVI. AUGUST, 1895. No. 8. 



Some Details as to ToUes' i-75th Objective. 



By EPHRAIM cutter, M, D., LL. D.* 



NEW YORK. 



Explanatory. — So far as these items, which are fur- 

 nislied by request for this Journal, touch others, it is 

 pleasant to give them. Egoisms have small place in 

 science, to be given only when they cannot be avoided. 

 This paper is to be taken as a compliance with requests 

 from such a source that not to heed them would show ill 

 grace. The one-seventy-fifth microscope objective was 

 made for a certain work. It did that work. Indeed it 

 did more. It put American artizanship as worthy of a 

 place among foreign artizans, the latter being voluntarily 

 witnesses. 



DETAILS. 



1. The one-seventy-fifth was ordered for this pur- 

 pose : In 1869, Geo. B. Harriman, D. D. S., of Boston, 

 discovered a simple novel mode of dissecting teeth, 

 which was to turn them on a lathe as iron is turned. 

 Thus he succeeded in demonstrating the nerve axis cylin- 

 der of dentine. Though toothache means nerves in den- 

 tine. Dr. H-irrirnaa's statement was denied. To con- 

 firm his discovery Dr. H. ordered Robert B. Tolles, in 

 1870, to make this objective — giving him carte blanche 



* Professor ot Clinical Morpholofjy and Applied Medicine, College of Phy- 

 siciau.s and Surgeons, Boston, Mass.. Princ. School of Micrology. N. Y. 



