THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Voi,. XVI. AUGUST. 1895. No. 8. 



Some Details as to Tolles^ i-75th Objective. 



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



NEW YORK. 



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

 nished 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 par- 

 pose : In 1869, Greo. 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. Harriman'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 of Clinical Morphology and Applied Medicine, College of Phy- 

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



