30 PRACTICAL ORGANIC CHEMISTRY Examples of the use of this apparatus (or that shown in Fig. 14, p. 31) will be found in the preparation of phenylhydrazine (p. 195), ethyl acetoacetate (p. 264), ethyl malonate (p. 272), quinaldine (p. 300), triethyl phosphite (p. 308) and di-isopropyl hydrogen phosphite (p. 309). The simplest form of manometer for this purpose is an ordinary barometer tube, as shown in Fig. IZ(B): this form has the disadvantages, however, that the surface of the mercury in the tube is easily fouled and then difficult to read, and that in any case an accurate measurement of the long column of mercury is not simple.* A neater and more accurate type of manometer is shown in Fig. IZ(G). The mercury is contained in a fine glass U-tube G fused to a horizontal cross-piece, which is sealed on one side, and on the other leads through the tap I to a thick-walled U-tube H, which contains granular calcium chloride in the left-hand
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.