. Elementary chemical microscopy . Fig. 140. and measure the amount of displacement of image 00' of a mark at 0 upon the upper surface of the glass slide, the index of DD' refraction n will be found from the equation n = fZF\i' Method 1. A Cell and Cover Glass of Known Thickness.— Cement upon an object slide of clear glass a cell whose top and bottom are ground true and parallel. After the cement has hardened, determine the depth of the cell by means of calipers, dial gauge or by means of the micrometer screw of the fine 1 This method is very old and is generally known as the Due de Chaulnes M
. Elementary chemical microscopy . Fig. 140. and measure the amount of displacement of image 00' of a mark at 0 upon the upper surface of the glass slide, the index of DD' refraction n will be found from the equation n = fZF\i' Method 1. A Cell and Cover Glass of Known Thickness.— Cement upon an object slide of clear glass a cell whose top and bottom are ground true and parallel. After the cement has hardened, determine the depth of the cell by means of calipers, dial gauge or by means of the micrometer screw of the fine 1 This method is very old and is generally known as the Due de Chaulnes Method, having been described by him in 1767-1770. See also Sorby, Chem. N., 37 (1878), 151; Watson, Physics; Johannsen, Manual of Petrographic Methods.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopy, bookyear1
