The Microscope. 151 



of them should be so considered ; but be this as it may, I think 

 it best to leave this question for future investigation. 



Seven out of the twenty-five hours for many months were 

 devoted to the pursuit of this subject, a very large number of 

 slides being carefully examined with the following objectives, 

 together with a first-class substage condenser : 



Bausch & Lomb Optical Co. 3-4 in. 



Bausch & Lomb Optical Co 1-5 in. 



Beck 1-8 in. 



Nachet No. 5 19 in. 



C. A. Spencer, Im 1-12 in. 



Bausch & Lomb Optical Co., H. I 1-12 in., N. A. 1.43. 



Zeiss, H. I 1-12 in. 



Hartnack Im. No. 10 1-16 in. 



Tolles— dry 1-30 in. 



The terminals can be seen with a good 1-5 inch objective ; 

 but my most satisfactory views were obtained with the Bausch 

 & Lomb H. 1. 1-12. 



As the drawings illustrating this subject are necessarily in- 

 complete, and fail to represent many forms of ganglionic cells, 

 and also, as some may be disposed to question, I would say that 

 I have a number of photo-micrographs illustrating this subject 

 which I shall be pleased to send any one for inspection, as veri- 

 fying my statements. Heretofore I have felt much hesitancy 

 about publishing the results of my observations, but having, 

 with a new Gundlach Optical Oo.'s 1-30 N. A. 1.25, made to my 

 order for this especial purpose, succeeded in securing several 

 good negatives, I am in a position to demonstrate in a great 

 measure my assertions, to those who from lack of time, or in- 

 clination, fail to investigate the subject for themselves. 



In making the photo-micrographs 1 am greatly indebted 

 to my friend Dr. S. M. Mosgrove for his kind assistance and co- 

 operation, for which I wish to express my hearty thanks, and 

 also to my friend and former preceptor, Dr. Starling Loving, 

 of Columbus, Ohio, for many kind words of encouragement, 

 while I have been at work on this subject, and last but not 

 least, to my friend Dr. A. E. Bleile, of Columbus, Ohio, to whose 

 suggestion is due the fact of my having ever undertaken the 

 study of this special subject. It may not be out of place to 



