APPENDIX. 353 



CONGRESS TURN TABLE. 



This table has made a reputation for itself. Retail 

 price $6.50 



PRICES OF ACME SERIES OF OBJECTIVES. 



2 inch, 15 ... $13.00 ' 3-10 inch, 115 non adjust- 

 able, . . $16.00 

 H " 18 ... 14.00 3-10 u 115 adjustable, 20.00 



1 " 36 ... 15.00 1-4 " 100 non-adjust- 



able, . . 14.00 



f " 32 ... 12.00 1-5 " 120 non-adjust- 

 able, . . 16.00 



f " 36 ... 15.00 1-5 " 120 adjustable, 20.00 

 | * 60 ... 14.00 Other lenses quoted in 



Catalogue. 



MICROSCOPE OBJECTIVES, BY MESSRS. C. A. SPENCER 

 & SONS, GENEVA, N. Y. 



FIRST CLASS. 



Size. Deg. Price. 



3inch 13 $1800 



2 inch.. 20 2500 



1 inch 50 4500 



2-3inch 47 3200 



1-2 inch 100 Adjustable 50 00 



1-4 inch, dry and immersion 180 6500 



1-6 inch, " " 180 7000 



1-8 inch, " u 180 7000 



l-lOinch, u " 180 8000 



1-16 inch," " 180 11500 



PROFESSIONAL SERIES. 



3inch 13 $1800 



2inch 16 1800 



1 inch 33 1800 



2-3inch 36 2000 



23 Microscopy. 



