MICROSCOPIC MOUNTING. 43 



X E W M () U X T I \ G 



FOR 



MICROSCOPIC OBJECTS. 



By HIRAM A, CUTTING, A. M., M. D., 



lA'NENBURGH, VER:M0NT. 



After mail}- experiments with Briui.swick bluelv, iioUl 

 size, &c., as well as the various varnishes used for that 

 purpose, I tiiid in zinc white mixed with Daniar varnish, 

 a substitute in ever\- ^Y•dy adapted to the purpose. Some 

 of its advantages are that in mounting in glycerine, a circle 

 may be made with the prepared paint on the slide which 

 l^artially dries in a short time. Then put a drop (jf glyc- 

 erine within this circle, mounting in the usual way, pressing 

 the cover down lirmly upon the ring of thin })aint 

 where it will closely adhere. It will not cloud the glycer- 

 ine, and \'ou can finish at vour leisure. In niountiu''' in 

 ii'elatine or balsam vou can mount in the same wav if you 



O «^' •■■■ •/ 



choose, if not the paint Avill not I'un under the glass cover 

 as the Brunswick black is apt to do. This varnish and 

 zinc white will become very hard when dry, and will adhere 

 so firmly to the glass that you cannot sepafate it without 

 much difficulty, instead of its cracking off as is frecjuciif ly 

 the case with the Brunswick black. It will not craci< at 

 any temperature ; and further, the object may be finished up 

 at once; striped with red, blue, or any other color, which 

 will give it a finished look, and after two or three days 

 it will be safe in any position. These advantages, together 

 with great dural)ility, should, I think, recommend it to all. 



