APPENDIX. 347 



Deg. Price, 



8-4inch 27 800 



l-2inch 72 2200 



1-2 inch 40 9 00 



4-10 100 20 00 



3-10 75 11 00- 



1-4 100 .', 14 00 



1-5 108 1500 



1-6 inch 180 Adjusting 30 Oft 



1-8 Immersion 180 Adjusting 4000 



MICROSCOPES OF THE MESSRS. R. & J. BECK, OF 

 LONDON. AMERICAN AGENCY IN CHARGE OF 

 W. H. WALMSLEY, ESQ , 1016 CHESTNUT STREET, 

 PHILADELPHIA, PA. 



Popular Microscope stand, binocular, with one pair of 

 eye pieces, concave mirror, diaphragm, forceps, glass 

 plate, pliers, etc $65 Oa 



Same, but monocular 40 00 



Economic Microscope, as furnished by the makers, mo- 

 nocular, with sliding coarse adjustment, 1 inch and 

 1-4 inch object glasses, 1 eye piece, concave mirror, 

 condensing lens, glass plate with ledge, brass pliers 

 and diaphragm, in mahogany case 35 00- 



The same, with rack and pinion, for coarse adjustment, 

 concave and plane mirrois, stage forceps, etc., in ma- 

 hogany case 50 00 



(Both of the above stands are fitted with fine adjust- 

 ment screw.) 



Extra eye pieces, each 4 00- 



The Messrs. Beck have just published a large and com- 

 plete illustrated catalogue of their microocopes and 

 other scientific instruments, which they furnish to any 

 one on application. Among their later models of mi- 

 croscope stands we notice the u New National," cost- 

 ing, with one eye piece, concave and plane mirrors, 

 diaphragm, stage forceps, glass plate pliers, etc 40 OO 1 



Mahogany cabinet for the same 10 00 



