266 



NEGRETTI AND ZAMBEA, HOLBORN VIADUCT, E.G., 



922 



Negretti and Zambra's Large Binocular Microscope, with Mechanical 

 Stage, having motion in rectangular directions, Sliding and Rotating 

 Object holder, Spring Slide Clamps, Sub-stage with rectangular motions, 

 revolving diaphragm, flat and concave Mirrors, clamping arm to fix 

 instrument at any angle, coarse and fine adjustments, two A, two B, one 

 C, one D, and one Micrometer Eye-pieces, six Best Achromatic Object 

 Glasses, viz., 3-inch, 1^-inch, 1-inch, |-inch, -inch, and -inch. Polarising 

 Apparatus, Barker's revolving Selenite Stage, Paraboloid, Spot Lens, 

 Stand and Stage Condenser, Side reflector, Brook's double Nose-Piece, 

 Camera Lucida, Reversible Compressorium, Frog Plate, large and small 

 Live Boxes, two Stage Plates, Stage Micrometer, Stage Forceps, straight 

 and curved Forceps, Dipping Tubes in case, fitted in Solid Mahogany 

 Cabinet with Plate Glass door (fig. 922) 90 



