The Microscope. 



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Vol. VIII. DETROIT, APRIL, 1888. No. 4 



ORIGINAL COMMUNICATIONS. 



EECENTLY-DISCOVERED MICROSCOPES OF HISTORIC 



INTEREST. 



JACOB F. HENKICI. 



I HE first microscope described below was found among a lot of 

 ■*- old books and miscellaneous rubbish in a store-room in the 

 village of Economy, Pennsylvania, the residence of the Harmony 

 Society, a communistic society which came to America from Wurtem- 

 burg, Germany, in the years 1803-5. Having adopted celibacy, 

 and having received but few accessions for many years, the society 

 has dwindled in numbers from about one thousand to fewer than 

 forty members, most of whom are very aged, and could give no 

 account of the microscope, except that fchey thought it formerly 

 belonged to Frederick Rapp, one of the early members of the com- 

 munity, who died in 1834.* The instrument was exhibited at the 

 annual reception of the Iron City Microscopical Society, in 1886, 

 and more recently at the annual meeting of the American Society of 

 Microscopists in Pittsburg. 



In a drawer in the base of the stand were found four objectives, 

 together with six extra lenses, making ten in all, of which eight are 

 bi-convex, and the other two plano-convex, yielding a magnifying 

 power of 85 to 250 diameters; a brass slide, from which the cover- 

 glasses, as thick as common window-glass, may be withdrawn by 

 removing a brass cap on the end of the slide, thus permitting objects 



* Nordhoff : The Communistic Societies of the United States. 



