Scientific Papers, Dept. of Chemistry and Chemical Engineering

Scientific Papers, Dept. of Chemistry and Chemical Engineering

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: make the dilution with certainty P--,"7) and without stopping the stirrer L. The calorimeter unit, consisting of the 3 calorimeters, their supporting framework and stirrers, were mounted in a constant temperature jacket, as shown in Fig. 4. This consisted essentially of one of the standard cast-iron water thermostats O I % 36" X 18" X 18," as used in this laboratory. This thermostat was well stirred, well lagged and kept constant to 0.01. Above this was constructed a wooden thermostat, P, of matched lumber. The air was stirred by means of an ordinary 8 desk fan, Q, was heated by means of lamps, and was regulated to 0.02 by means of a relay and a brass-rubber thermal regulator. The operation of the dilution cup was accomplished through small openings covered with canvas in larger doors which gave access to the calorimeter. The operating position of the calorimeter unit was as shown in Fig. 4. It was counterbalanced by means of the weight R and was raised vertically along the guides S S for convenience in assembling. The main thermoelement D consisted of 50 junctions of No. 36 double silk covered copper Fig. 4 Twin calonm-wjre gQgj. to,0 double silk covered coneters 1n constant temper-.." ature jacket. stantan (Electr1cal Alloy Co. Ideal ) w1re. The Scale: 1 cm. = 20 cm. auxiliary consisted of 20 similar junctions. The wire was carefully tested by the method of White.1 The junctions were insulated by means of cellulose acetate, the couples bundled, and the wire held in place by wrapping the bundle with a single layer of silk binding tape. Seven No. 24 double, silk-covered, copper leads were brought out from the thermocouples and connected to non-thermoelectric binding posts2 mounted on hard rubber. Four of the more

Product details

  • Paperback | 86 pages
  • 189 x 246 x 5mm | 168g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236485181
  • 9781236485182