. On microscopical manipulation : being the subject matter of a course of lectures delivered before the Quekett Microscopical Club, January-April, 1869. accurately ground. Such vessels are very useful inlooking over the results of pond-hunting with a lowpower, for the purpose of sele6ting such objedts asmay be required for more detailed observation. Thetroughs, of various shapes, can be purchased atmost opticians. The form represented in Fig. 15 is particularly 46 MICROSCOPICAL MANIPULATION. convenient, as by means of the whalebone spring,/,and the wedge, g, the space between the front glass,6
. On microscopical manipulation : being the subject matter of a course of lectures delivered before the Quekett Microscopical Club, January-April, 1869. accurately ground. Such vessels are very useful inlooking over the results of pond-hunting with a lowpower, for the purpose of sele6ting such objedts asmay be required for more detailed observation. Thetroughs, of various shapes, can be purchased atmost opticians. The form represented in Fig. 15 is particularly 46 MICROSCOPICAL MANIPULATION. convenient, as by means of the whalebone spring,/,and the wedge, g, the space between the front glass,6, of the trough and the inclined plate, e, is capableof adjustment, so that an objedt can, when desired,be kept close to the front glass. These parts can beremoved when a greater depth of water is requiredfor larger objedts. A simple and useful contrivance, to be used as agrowing-slide, has been described by Mr. C. J. Muller{Monthly Microscopical Journal, vol i., p. 174). Theobjedt of a growing-slide is to keep alive any minutewater-plant or animal, the development of which it is Fig. ®. B wished to observe. Many plans have been devisedfor this purpose, but none equal in simplicity orefficiency that now to be described. An ordinary 3x1 slide (Fig. 16, A) is pierced with aminute hole at about 3-ioths of an inch from the centreon one side. When an obje6t under investigation is GROWING SLIDE. 47 put upon it immersed in water, the thin glass coveris so placed as to include this hole, which shouldbe near its margin. When it is desired to keepthe specimen moist while off the stage of the micro-scope, the slide is placed in a small flat trough (B)in an oblique position, object uppermost, with oneend (that nearest the hole) resting against the bottomof the vessel on one side, and the other resting uponthe edge of it. Sufficient water is put into the vesselto admit of the liquid reaching within a i or i aninch of the glass cover on the upperm^ost side, whenit will be found that th
Size: 3348px × 747px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectmicroscopy, bookyear1
