Transactions - North of England Institute of Mining and Mechanical Engineers Volume 3

Transactions - North of England Institute of Mining and Mechanical Engineers Volume 3

List price: US$21.50

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks


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. 1855 edition. Excerpt: ...entire pressure creating the movement, (being the sum of the above, ) will be expressed by f (s-s)+ 4-(s + B) G = T ) 105 where G represents the pressure in inches of water column; and hence, r =?L 106 S-s +-J-(S + s) so that if we suppose the oil used, to be refined linseed oil, having a specific gravity of 940, that of water being 1,000; and the area of the vessel to be 729 times that of the glass tube, or each compartment to be 364J times the area of the glass tube; which would be the case if the metallic vessel had a diameter of about 9 inches, while that of the glass tube is taken at J of an inch, both the metallic vessel and tube being supposed to be cylindrical, or having circular sections. Then, an inch of water-gauge would be represented by a rise equal to r = 1TM 1 = 15-3087 1000-940 + (1000 + 940) inches in such an instrument; so that it would have a scale upwards of 15 times as long as that of a water-gauge, to represent equal pressures. If, in such an instrument as has just been described, a small vertical strip of glass were cemented into the metallic vessel, so as to shew the height of the surfaces of the oil on one side of the diaphragm, and of the water in the other compartment of the vessel, and if this glass were divided into inches and tenths, in continuation upwards, of the scale before alluded to, it would enable us to determine the relative densities of the oil and water, employed in using the instrument; and would be also serviceable in enabling the actual volume of enclosed air, contained in the vessel, to be ascertained; which will be required if the instrument should be used in the manner hereafter to be explained, for determining the difference of pressure, prevailing at parts of an air-way situated more

Product details

  • Paperback | 126 pages
  • 189 x 246 x 7mm | 240g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236621719
  • 9781236621719