Author Description

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. 1908 Excerpt:... intensified by affixing the radium tube to the outside of the walls of the fog chamber. In table 29 there is further intensification, obtained by acting upon the fog chamber with the X.rays at d = 50 cm. Tablb 28.--Dust.free wet air ionized by weak radium (10 mg. io.oooX) on glass fog chamber. Bar. 74.9 cm., 75.0 cm.; temp. i7.7C. Fog limit below = 0.756 at 180, equivalent to-1.22, equivalent to a drop (adiabatically) of dp = 18.6 cm, (about) at 76 cm., 2 cm. below Wilson's Sp = 20.5 cm. Fig. 20.--Nueleation n of dust.free air and of ionized air in terms of relative adiabatic drop in pressure dp/p and of volume expansion vjv. Enlarged scale for n. Region for ions. Fig. 31.--Nueleation n in terms of relative adiabatic drop of pressure dp/p, and of volume expansion vjv for dust.free air not energized, and for dust.free air acted on by the beta and gamma rays of radium and by the X.rays from different distances D. W refers to C. T. R. Wilson's condensation and fog limits, B to my own; T shows J. J. Thomson's results referred to scale of the diagram. Several older series, V to X, are given for dust.free air. 40. Graphs. Dust-free air.--The charts (figs. 20, ax, and 22) contain a number of curves showing the nueleation 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 (vl/v = i. 24,--22.--Results similar to preceding but in a different scale. 0. P. is taken from the Carnegie Institution of Washington Publication No. 62. W indicates the probable position of Wilson's line, so far as can be made out. adiabatic d...