The Microscope. 231 



follows : " It is true you can get benzol at the figures you name, 

 but I pay just double the price you mention. I use only Merck's 

 chemically pure, crystalized benzol. As to the damar, that too 

 is cheap in the crude condition, and when used in that way is 

 another cause for poor cement. I take only picked lumps and 

 dissolve them in pure benzol slightly in excess of what is neces- 

 sary. After filtering through absorbent cotton I add a little 

 zinc oxide and agitate for a few moments, then set aside to clear, 

 which it does in three or four days. I never make up more than 

 two drams of the cement at a time, rubbing this thoroughly and 

 pouring into a stock bottle and then repeating the operation. In 

 making up a pint of this cement the mortar is emptied from 60 

 to 70 times." All these items and others the doctor mentions 

 contribute to the excellence of his article. By following his 

 method, and by selling the cement at 40 or 50 cents an ounce 

 we are in great fears that the net pecuniary emoluments derived 

 therefrom will quite overwhelm him. 



Badsch & Lomb state that they have now overcome all 

 difficulties in the working of their microtomes and they invite 

 interested parties to examine them. 



We would call attention to the change in the advertisement 

 of Mr. Zentmayer. His new illustration shows the " Histolog- 

 ical " microscope improved. The body is enlarged to take the 

 eye pieces of the Army Hospital pattern; the substage is like- 

 wise enlarged. The mirror bar is made sliding, and the base is 

 larger. Mr. Zentmayer is ever awake to the interests of his 

 patrons. 



Is it a Fraud ? — The editor of the " Cincinnati Medical 

 News " had an editorial in a recent number entitled "A Fraud." 

 He relates how a house doing business in Cincinnati promises to 

 sell a microscope "which is represented to have belonging to it 

 a half inch and one-sixth inch objectives, the latter able to re- 

 solve p. angulatum, for $22.50." The editor pronounces it a 

 fraud and a swindle. We fear he is a trifle hasty in his judgment, 

 for certainly the firm mentioned is not far from telling the truth. 

 We are ready to make the announcement that we can tell any 

 one where to buy a microscope with neatly japanned base and 

 pillars ; with an arm that can be inclined to any angle ; with 



