Laboratory exercises to accompany Carhart and Chute's First principles of physics . liquids and as an indi-cation of their purity. In the purifica-tion or separation of liquids by distilla-tion, the observed boiling points are theguides to the steps in the process. Experimental: Melting Points. — (a) Light theburner underneath the beaker of water(Fig. 78). Have a very small flame, sothat the water will heat very slowly. Put the open end of a capillary tube Fi~ 78 into some stearic acid, so as to get acolumn of the solid several millimeters in length. Turnthe tube upright and tap the closed end
Laboratory exercises to accompany Carhart and Chute's First principles of physics . liquids and as an indi-cation of their purity. In the purifica-tion or separation of liquids by distilla-tion, the observed boiling points are theguides to the steps in the process. Experimental: Melting Points. — (a) Light theburner underneath the beaker of water(Fig. 78). Have a very small flame, sothat the water will heat very slowly. Put the open end of a capillary tube Fi~ 78 into some stearic acid, so as to get acolumn of the solid several millimeters in length. Turnthe tube upright and tap the closed end gently on thetable, so that most of the solid falls to the bottom of thetube. Slip the tube through the rubber band (Fig. 78, B)on the thermometer so that the solid is inthe position indicated in Fig. 78. Move the glass stirrer1 up and down inthe beaker until you see some of the smallparticles sticking to the capillary walls the temperature and record it as themelting point of the stearic acid in a tabular form onthe left-hand page. In case you heated the water too.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysics, bookyear1913
