Pike's Illustrated Descriptive Catalogue of Optical, Mathematical and Philosophical Instruments; Manufactured, Imported, and Sold by the Author, with the Prices Affixed at Which They Are Offered in 1856 Volume N . 1

Pike's Illustrated Descriptive Catalogue of Optical, Mathematical and Philosophical Instruments; Manufactured, Imported, and Sold by the Author, with the Prices Affixed at Which They Are Offered in 1856 Volume N . 1

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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. 1856 edition. Excerpt: ... Barrel Air Pump with raised plate.--This powerful and simple arrangement of the large single barrel air pump, is represented in Fig. 184, as above. The barrel is of brass, fourteen inches long and two inches diameter, having a broad brass base, firmly bolted to the frame by screws beneath. The piston is worked by standing-with the feet on the frame and grasping the handle with both hands, by which means a much larger piston may be Fig. 185. worked than in the ordinary construction, and being also less fatiguing to the operator. The pump plate is supported by four mahogany pillars, on a table elevated about twenty-eight inches. The connexion between the pumpplate and the cylinder is by a brass pipe, having a stop-cock for shutting off the communication when required. The frame is of polished mahogany; the base twenty-two inches long and fourteen inches wide. Price, $20.00. Condensing Apparatus.--The condenser is a syringe by which a large quantity of air may be forced into a given space. It is constructed on the same principle as the air pump; only the valves are disposed in the contrary order, that is to open inward instead of outward. Fig. 185 represents a syringe furnished with a handle, moving a solid piston air-tightly in a cylindrical barrel, which barrel is furnished with a valve at the foot, and either a small hole near the top of the barrel, or else the piston, instead of being solid, is perforated, and has a valve also opening downwards. It will be evident, that working the handle up and down will alternately fill the barrel with air from the upper part, and condense it into any vessel attached to the screw at the foot. The air vessel is a strong globular shaped glass vessel, supported on a foot, having a neck to which a brass cap with...show more

Product details

  • Paperback | 98 pages
  • 189 x 246 x 5mm | 191g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236602978
  • 9781236602978