A Manual Of Photography

108 GRIFFIN’S SCIENTIFIC CIRCULAR. [March, 2793. Compound Achromatic Microscope with vertical sliding body, mounted on massive circular base, two eye-pieces, concave mirror, fine tangent screw adjustment, two sets of Achromatic ob- ject glasses, forceps,live- box, needles and knife for dissection, and con- denser for examining opaque objects ; the whole enclosed in a polished mahogany case with lock and key {fig. 2793), 5l. 5s. This Microscope possesses sufficient defining and magnifying power for the ordinary investigations of the Physician or Student. 2794. Compound Achromatic Microscope, with ver- tical sliding body, detached eye - piece, concave mirror, fine 2796. 2793. tangent screw adjustment, set of Achromatic object glasses, forceps, needles and knife for dissection, in a polished mahogany box with lock and key (fig. 2793), 3l. 10s. 2795. Compound Achromatic Microscope (fig. 2793), (without condenser or stage adjustment) with vertical sliding body, concave mirror, Achromatic object glass, forceps, live-box, needles and knife for dissection, the whole enclosed in a polished mahogany box, 2/.12s. 6^. 2796. Compound Microscope {fig. 2796), with vertical sliding body,circular stage, concave mirror, three magnifiers, forceps and two prepared microscopic objects, the whole enclosed in a polished mahogany case, 15s. 2797. Compound Microscope {fig. 2796), with vertical sliding body—circular stage, concave mirror—magnifier—forceps and a prepared microscopic object, the whole enclosed in a polished mahogany case, 10s. 6d. *** The directions given in Griffin's Scientific Circular, No. 4 (price 2d. post free), for using the Compound and Simple Microscopes, (Nos. 2330 to 2340), apply also to the above forms of Microscope. Preparing for Publication, A TREATISE on the USE of the MICROSCOPE, illustrated by numerous Engrav- ings. To form a volume of the “ Encyclopædia Metropolitana.’