374 HOW TO SEE WITH THE MICROSCOPE. 



me in the selection of the objective, which I now prize more 

 than ever, and it is astonishing how much is due to handling. I 

 had no idea of it." A few weeks ago he wrote me that he was 

 doing finely with the duplex, and had succeeded with it in trac- 

 ing structure (histological) that could not possibly have been 

 seen with any low-angled glass. Further, that the very best 

 makes of the low angles were constantly within his reach. 



Now it is a fact that before I furnished this gentleman with 

 the duplex, he was as fully committed in favor of low angles as 

 Prof. Hitchcock can be ; but, unlike Prof. H., he commenced 

 the study of high apertures, and with the sure results above 

 narrated. His address will be furnished to any one desiring it. 



Prof. Hitchcock says something (I quote from memory) about 

 " accepting defeat in a becoming manner." I desire most earn- 

 estly to advertise the fact that it is not, has not, been any part 

 of my purpose to u defeat " Prof. Hitchcock, and as I have 

 understood the gentleman from the very onset, he is not, nor 

 has he been, in a position to suffer defeat. He simply wants 

 the facts, and I have endeavored to furnish them, and if so be 

 that any good has been brought about by this discussion, your 

 readers are quite as much indebted to Prof. Hitchcock as to any 

 one else. 



In conclusion, I return Prof. Hitchcock my sincere thanks 

 for the courteous and gentlemanly consideration he has 

 ever extended me. It has been my intention to reciprocate, and 

 with the hope that I have been in a measure successfnl, and 

 with the kindest feelings towards Prof. Hitchcock, to you Mr. 

 Editor, and to your many readers, I remain sincerely yours, 



J. EDWARDS SMITH. 



NOTE. In your October number, page 132, an obvious error 

 occurs. For " what was known as a high-angled l-10th of 180 

 ten years ago," read lk 130 ten years ago," etc. J. E. S. 



