66 BENJ. PIKE'S, JR., DESCRIPTIVE CATALOGUE. 



cal cabinet, 5-inch globe, tellurion, orrery, 



and thermometer - - $16.00 



1264 Eye-pieces of various powers, separate from 



the microscopes, each $2.50 and 3.00 



1265 Sets of three achromatic object-glasses, low 



power, $4.50 ; medium power, $6 ; high 



power - - 9.00 



1266 Camera lucida for microscope - - 7.00 



1267 Micrometer for microscope - - 3.50 



1268 Microscopic objects on glass, per dozen - 2.50 



1269 Microscopic objects, finely prepared, 



per dozen, $4.50 to 6.00 



1270 Glass slips for microscopic slides or prep- 



aration, per dozen 0.50 



1271 Glass slips, with ground edges, per doz., 88 cts. 1.00 



1272 Views of the microscopic world, by John 



Brocklesby, A. M., a book of 150 pages, 

 square octavo, with 250 engravings, neatly 

 bound in cloth, containing a short descrip- 

 tion of the single, compound, and solar 

 microscopes, with an interesting and use- 

 ful exhibition and description of some of 

 the most rare and curious objects - - 1.12 



1273 The microscopists, by J. H. Wythes, M. D., 



a book of 200 pages, 12mo, with 64 cuts, 

 being a manual on the use of the micro- 

 scope, for physicians, students, and lovers 

 of natural science 1.50 



