342 HOW TO SEE WITH THE MICROSCOPE. 



(*)James W. Queen & Co., 924 Chestnut street, Phil- 

 adelphia, Pa. 



William A. Kogers (Micrometer Plates, etc.,) Cam- 

 bridge, Mass. 



(*)Messrs. C. A. Spencer & Sons, (Objectives, Ac- 

 cessories, etc.,) Geneva New York. 



L. Schrauer, 50 Chatham street, New York. 



(*)J. W. Sidle & Co., Lancaster, Pa. 



(*)Robert B. Tolles, Hanover street, Boston, Mass. 

 Charles Stoclder, Agent, Devonshire street, Boston, 

 Mass. 



(*)George Wale, Patterson, N. J. George Wale & 

 Co., Hoboken, N. J., Agents. 



(*) William Wales, Fort Lee, New Jersey. 



(*) Joseph Zentmayer, 147 South Fourth street, Phil- 

 adelphia, Pa. 



The following price list of stands, etc., is only in- 

 tended to include those previously described in this 

 book. Several of the makers therein mentioned manu- 

 facture various models not included in our list. The 

 stands ot the Messrs. Spencer's have been intention- 

 ally omitted, as we learn that they are now devoting 

 their entire attention to the production of objectives. 



The list of objectives is similarly incomplete. With 

 the glasses of Messrs. Tolles and Spencer we have had a 

 large experience. Several months ago the Messrs. Bausch 

 & Lomb sent us a line of their objectives for study, 

 all of which, after working with the same more or less 

 for nearly a year, proved reliable glasses for their cost. 



