. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. COMPOUND MICEOSCOPE. 767 In figure 946 a compound microscope is represented. The stand or base consists of a strong tripod, a, supporting two upright pillars, 6 6, between the upper parts of which an axis works. This carries the whole of the optical parts of the instrument, which can be adjusted to any inclination, horizontal, vertical, or intermediate. The stage, d e, is firmly attached to the axis, as is also the double mirror, /. The triangular bar, g, has a rack on
. A Manual of botany : being an introduction to the study of the structure, physiology, and classification of plants . Botany. COMPOUND MICEOSCOPE. 767 In figure 946 a compound microscope is represented. The stand or base consists of a strong tripod, a, supporting two upright pillars, 6 6, between the upper parts of which an axis works. This carries the whole of the optical parts of the instrument, which can be adjusted to any inclination, horizontal, vertical, or intermediate. The stage, d e, is firmly attached to the axis, as is also the double mirror, /. The triangular bar, g, has a rack on its posterior part, which is worked by a pinion, the miUed heads of which are seen at h h. The body, i, screws firmly into the arm, j; the achromatic object-glasses are screwed into the body at TO; the Huyghenian eye-piece slides into the other end of the body. The mirror is plane on one side, and concave on the other, and is fitted with a universal movement, so as to be inclined in any desired position. The milled heads, h h, by being revolved, raise or lower the body, i, and constitute the coarse adjustment; the fine adjustment is effected by turning the miUed head,^. The object to be examined is placed on the stage, d, and retained in the required position by the sliding piece, e. The quantity of light admitted through the instrument may be modified by the diaphragm, r, which consists. Fig. 94r. Pig. 947. Hartnack's (Oberhauser's) student's Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Balfour, John Hutton, 1808-1884. Edinburgh : A. and C. Black
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1875
