. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. iliij|UAu*i Kg. 176. METHOD OF MOUNTING OBJECTS IN FLUID. 285 from running in to spoil the object, the author's late brother, Mr. Edwin Quekett, adopted the plan represented by fig. 176, which was to take a piece of writing paper, about one-eighth of an inch smaller ' " â â "l^""nr'"=" 1 â ,. each way than the cover to be em- ployed, and from the middle of this to cut a square or circula
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. iliij|UAu*i Kg. 176. METHOD OF MOUNTING OBJECTS IN FLUID. 285 from running in to spoil the object, the author's late brother, Mr. Edwin Quekett, adopted the plan represented by fig. 176, which was to take a piece of writing paper, about one-eighth of an inch smaller ' " â â "l^""nr'"=" 1 â ,. each way than the cover to be em- ployed, and from the middle of this to cut a square or circular hole suf- ficiently large to hold the object. After the fluid had been placed on the slide, and the object deposited in it, this paper cell was also placed in the fluid, and when adjusted to the centre of the slide, the cover was laid on in the usual manner, the paper preventing the cement from running beyond it to obscure the object. Following out this principle, Mr. Darker has ingeniously con- trived a cell of the form represented in plan by A B, fig. 177, and in section by C. These cells are cast in glass of the size represented by A B, and, in order to prevent the cement from running in, the sides are constructed as shown by G D B; B being the outer margin of the cell, D a flat surface for the cover to rest on, and G a gi'oove between it and the inner margin. These cells are cemented to the shdes in the usual manner, either with marine-glue or asphaltum dissolved in turpentine, the method of cementing down the cover is the same as in the other forms, a small quantity of gold-size being applied around its edge either with a brush or the finger before it is placed on the fluid within the cell; should there be any tendency in the cement to run under the cover, it must first fill up the groove before it can get into the cavity where the object is. The under surface of this form of ceU can be ground sufficiently thin to enable a quarter of an inch object-glass to view any o
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Keywords: ., bookcentury1800, booksubjectmicroscopes, booksubjectmicroscopy
