Condensation of Vapor as Induced by Nuclei and Ions; Third Report Volume 3, PT. 4

Condensation of Vapor as Induced by Nuclei and Ions; Third Report Volume 3, PT. 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...series, V to X, are given for dust-free air. 40. Graphs. Dust-free air.--The charts (figs. 20, 21, and 22) contain a number of curves showing the nucleation in different scales (computed from the angular diameter of coronas) in terms of the exhaustion. In figs. 20 and 21 typical cases are given, in their lower parts only. Fig. 22 contains full curves on a smaller scale. Thus the curve for the vapor nuclei of dust-free air begins appreciably below dp/p = 0.26 (v1/v = i. 24, adiabatic drop from 76 cm., 19.8 cm.), but it hugs the axis until about 0.33, after which it sweeps upward far beyond the chart into the hundred-thousands. The position of Wilson's negative ions and positive ions is indicated at 0.27 and above 0.31. Wilson's fog point would lie at o. 36 in the chart and there would be an air curve to the right beyond. Series III to X are taken from my earlier report (Carnegie Institution of Washington Publication No. 62, 1907, p. 67). The serial number is marked on the curve. 41. Weak radiation.--If a weak ionizer (radium io, o00X, io0 mg., sealed in an aluminum tube) is placed at D = 40 cm. from the glass fog chamber, the air curve rises slightly above dp/p = 0.2$, becomes nearly constant slightly above 0.27 until above 0.35, after which it also begins to sweep with great rapidity into the hundred-thousands of nuclei. That is, at weak ionization the vapor nuclei of dust-free wet air become efficient in the presence of ions. There are but two steps in the curve, the initial one scarcely leaving the axis, the other at about n = 15,000 to 20,000. 42. Moderate radiation.--Let the radium tube be attached to the outer surface of the fog chamber. The curve which is obtained begins appreciably slightly above dplp = 0.24 (v 1/v = 1.21, more

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  • Paperback
  • 189 x 246 x 2mm | 82g
  • United States
  • English
  • black & white illustrations
  • 123699129X
  • 9781236991294