no THE MICROSCOPE. 



WE desire to call attention to the new diatom test plates of Mid- 

 ler, mounted in monobromide of naphthaline, giving greatly 

 increased ease of resolution, with wide-angle homogeneous immer- 

 sion lenses ; also to a new rack-box of pasteboard, finely finished, 

 with folding lid and sliding cover over all, and cloth bound corners. 

 This will retail for only twenty-five or thirty cents, and will surely 

 meet with popular favor. For sale by James W. Queen & 'Co. 



DR. C. T. MITCHELL, of Canandaigua, sends us an interesting 

 account of a large soiree given by the microscopical society of 

 that city. A number of persons from Rochester, Elmira, Auburn 

 and Syracuse assisted the home club. These are exceedingly inter- 

 esting and profitable occasions. 



AMONG the new things advertised in this number we would call 

 attention to the staining fluids and mounting media offered by 

 the Cheyney Optical Co. They make a specialty of these and their 

 new normal stands. 



BY the United States postal laws we are not required to discon- 

 tinue any subscription until all back dues are paid. We shall, 

 therefore, expect a remittance of twenty-five cents for each copy re- 

 ceived by those ordering their journal discontinued. 



THE invitations to the second annual soiree of the Elmira 

 Society are about as neat and tasty as anything we have ever 

 seen. Perhaps Dr. Up de Graff will send you one. 



The Medical News thinks "That Koch is rather too dogmatic 

 and self asserting and speaks with rather more than the amount of 

 confidence which characterizes a properly balanced scientific mind, 

 whose only object is to establish truth, and not a theory or opinion 

 of his own. On the other hand, it must be admitted that none of 

 the critics have repeated his experiments with the care and exhaust- 

 iveness which he has used." 



