The Microscope. 269 



this quite opaque and black bottom of the cell, attach the insect in 

 proper position by means of the paste referred to, and place some 

 light weight on the insect to hold it down until the paste is dry. 



Fresh insects are more pliable to put in position, but if used, 

 the slip must be put away until the object is quite dried, otherwise 

 there will be formed on the inside of the cover-glass a film which 

 will obscure the view. When dry, place the slip in a turn-table and 

 apply a thin ring of cement about the top of the cell, on which place 

 and press down the cover-glass evenly adjusted to the rim of the cell 

 and not so large as to project over. When the cement is hardened 

 three other thin coats may be added, having care that each coat is 

 dry before • the next is applied. As cements, by evaporation, so 

 quickly become thickened, there is a tendency to use them of such 

 consistency as not to flow freely, hence the work is not smoothly 

 done. 



If the first coat is not quite dried and too thick coats follow, the 

 cement is liable to run under cover. 



For adhesiveness, durability and beauty of finish, white zinc 

 cement will, if properly used, be found quite satisfactory. 



For labeling slides a very good paste is made with dextrine 

 mixed in camphor water to the consistency of ordinary mucilage, to 

 which paste is added about six drops of glycerine to the fluid ounce. 

 If this should tend to mold add two or three drops of carbolic acid. 



The processes described in these papers are not claimed to be 

 to any considerable exteat original; but are such as the writer has 

 found most satisfactory after some years of amateur experiment. 

 There are readers of The Microscope who can doubtless suggest 

 some improved methods. If they will do so, then more benefit will 

 result to those working in this line than anything herein set forth. 



Chicago, III. 



PROCEEDINGS OF SOCIETIES 



AMERICAN SOCIETY OF MICROSCOPISTS. 



'' I ""HE opening session of the tenth annual meeting of the Amer- 

 -*- ican Society of Microscopists was called to order by the 

 President, Prof. William A. Rogers, at eleven o'clock, Tuesday, 

 August 30th, in the chapel of the First Presbyterian Church, Pitts- 

 burg. Had the roll been called, probably not more than twenty- 

 five or thirty members would, at that time, have answered to their 



