APPENDIX. 347 



Deg. Price. 



3-4inch 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 00 



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 $6500 



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 00 



Mahogany cabinet for the same 10 00 



