The Microscope. 201 



viscid, (not as solid though as Glycerine Jelly). If both pre- 

 parations were clean, they do not need filtering. In two drachms 

 of this dissolve forty grams of "Stannus Chloride" — This will 

 dissolve cold. Now put it in a test tube, not more than one- 

 third full, and boil vigorously, when the solution clears up, and 

 if thought necessary can be filtered. It is then about as viscid as 

 old Balsam and is ready for use. It is used as follows: 



Put a small drop on slide (less than you would use of Bal- 

 sam) add the cover with Diatoms burned on it. Then holding 

 slide over lamp boil vigorously. The cover is now tightly ad- 

 herent, and the excess of fluid can be chipped off around cover, 

 and cleaned with Hydro-chloric Acid which dissolves it imme- 

 diately. The mount is thus made; but inasmuch as the Gelatin 

 is deliquescent, it is better to put on a ring of wax or shellac 

 cement which affords the needed protection. 



The Homogeneous Immersion Fluid for use with objectives 

 is made the same way as above only do not use so much Stannus 

 Chloride— add only sufficient to bring refractive Index to 1.52. 



Dr. Detmers, of Champaign, 111., in a short speech, called 

 attention to the important aid which might be rendered to the 

 society by means of A Quarterly Publication, which should 

 be devoted to the microscope and its uses. He said he had at- 

 tempted to start such a paper in Chicago, but so far without 

 success. He felt that the society should take some action in the 

 matter, and for that reason offered the following resolution: — 



Resolved, That a committee be appointed by the chair to 

 report on the advisability of the publication of a quarterly 

 microscopical journal, to be published by the American Society 

 of Microscopists. 



The resolution was put to vote with scarcely no discussion 

 and was lost by a decisive vote. 



Prof. Gage, of Cornell University, read two papers on 



" NOTES ON THE BLOOD CORPUSCLES OF NECTURUS," and " NOTES 

 ON THE EPITHELIUM OF THE MOUTH OF NECTURUS." 



In these papers the author stated he had seen the so-called 

 intracellular and intra-nuclear network of Heitzmann. This 

 provoked a very animated speech from Prof. Stowell, whose 

 views are well known on that subject. 



