NEGRETTI AND ZAHBRA, HOLBOEN VIADUCT, B.C., 



NO. 3 C. N0.4D. 



903 Student's Binocular Microscope, as 902*, with Rackwork Adjustment to 



eye-pieces, and an extra pair of eye-pieces (fig 4D.) . . . 10 10 



904 Negretti and Zambra's Student's Binocular Microscope, as No. 903, but with 



extra i-inch Power 12 12 



FIG. 905. 



905 The Naturalist's Portable Field Microscope, mounted on Folding Brass 



Tripod, with 1-inch Achromatic Object Lens, complete with Forceps, &c., 

 in Mahogany Box (fig. 905) 3 10 



906 Ditto ditto having 1-inch and i-inch 

 Achromatic Lenses, Live Box, Forceps, Fishing Tubes, Stage Glasses, 

 Stand Condenser, &c., &c., in Mahogany Box, very compact, invaluable, to 

 Mineralogists, Botanists, Geologists, Entomologists or Travellers 4 10 



