. The microscope and its revelations. FIG. 183.—Ceutriiu nose piece u-t-<l as Mill-stage(1881). BOSSS RECENT MICROSCOPES 231 The principal difference between the two instruments is in theirrespective stands. The one shown in fig. 184 gives a wider .spreadto the tripod base than usual, securing greater stability ; but this doesnot involve great space in packing, because the hind toe of the. FIG. 184 —Rosss new (tripod) bacteriological microscope (1898). tripod is made to fold forward between the two fixed front toes whennot in. use. The other similar instrument is 011 a circular foot, to whi
. The microscope and its revelations. FIG. 183.—Ceutriiu nose piece u-t-<l as Mill-stage(1881). BOSSS RECENT MICROSCOPES 231 The principal difference between the two instruments is in theirrespective stands. The one shown in fig. 184 gives a wider .spreadto the tripod base than usual, securing greater stability ; but this doesnot involve great space in packing, because the hind toe of the. FIG. 184 —Rosss new (tripod) bacteriological microscope (1898). tripod is made to fold forward between the two fixed front toes whennot in. use. The other similar instrument is 011 a circular foot, to which isscrewed a stout supporting pillar; the upper part is attached tothis by a substantial compass-joint; but the pillar is fixed on the mar-gin of the ring, thus bringing the whole weight centrally upon the 232 THE HISTORY AND DEVELOPMENT OF THE MICROSCOPE foot when the instrument is in an upright position. When inclined,the centre of gravity is again brought directly over the foot, as-lio\vH in fig. 185, by rotating the pillar upon a reliable fitting atits base, so th;it absolute steadiness is secured. This is a revival
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
