. On microscopical manipulation : being the subject matter of a course of lectures delivered before the Quekett Microscopical Club, January-April, 1869. edts. The microscope should be placed with the body ina horizontal position (Fig. 41), and, if the stand isnot of suitable height, it should be placed on a boxor other convenient support. The best distancebetween the eye and the paper, for general purposes,is 10 inches, this being the standard distance em-ployed in estimating magnifying power; but anyother that is convenient may be made use of, bearingin mind that the greater the distance from
. On microscopical manipulation : being the subject matter of a course of lectures delivered before the Quekett Microscopical Club, January-April, 1869. edts. The microscope should be placed with the body ina horizontal position (Fig. 41), and, if the stand isnot of suitable height, it should be placed on a boxor other convenient support. The best distancebetween the eye and the paper, for general purposes,is 10 inches, this being the standard distance em-ployed in estimating magnifying power; but anyother that is convenient may be made use of, bearingin mind that the greater the distance from the eye-piece the larger will be the image ; so that the sizeof the picture is capable of being regulated at will,the only limit being the difficulty of seeing the pencilwhen too near, and the trouble of drawing with apencil attached to a long stick if the paper is greatlyremoved from the usual position. I50 MICROSCOPICAL MANIPULATION. With respedt to the images formed by the several instruments, the camera lucida, as it refledls doubly, has the advantage of giving the image in the same position as when viewed through the micro- FiG. 41. ^ix>.
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