. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. ACCESSORY INSTRUMENTS. 143 piece of metal to keep down the tail. Some of the advantages of this little apparatus wiU be hereafter alluded to. Phial Holder.—This instrument, the contrivance of Mr. Varley, is represented in elevation by fig. 97, and in section by fig. 98. It consists of a tube of brass about an inch-and-. Fig. 97. Fig.! a-half in diameter, and two or more inches in length, having an oval hole cut out a
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. ACCESSORY INSTRUMENTS. 143 piece of metal to keep down the tail. Some of the advantages of this little apparatus wiU be hereafter alluded to. Phial Holder.—This instrument, the contrivance of Mr. Varley, is represented in elevation by fig. 97, and in section by fig. 98. It consists of a tube of brass about an inch-and-. Fig. 97. Fig.! a-half in diameter, and two or more inches in length, having an oval hole cut out at the top, and a smaller tube attached to the lower side, immediately opposite the hole; within this last slides a stiU smaller tube, provided in its interior with stops like those in the dark chamber, fig. 57 and a curved plate of brass at its top; it is capable of being moved up and down, but a spiral spring always presses it towards the hole^ in the large tube. The use of this apparatus is obvious; a smooth wide mouth phial, having chara or other water plants growing in it, is to be introduced into the large tube in the manner represented by fig. 97, the small spring tube having been first pushed down, the phial is then kept firmly in contact with the upper surface of the outer tube, but not so firm but that it may be either turned round or slid in or out. The small outer tube, besides containing the dark chamber, serves^ the purpose of attaching the whole of the apparatus to the stage of the microscope. In order that the phial may move very smoothly, all the parts fitting against it should be lined with. 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 Quekett, John, 1815-1861. London, H. Bailliere; [etc. , etc. ]
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Keywords: ., bookcentury1800, booksubjectmicroscopes, booksubjectmicroscopy
