The nucleation of the uncontaminated atmosphere . pection of the coronas (figs. 2-6) shows that they are largerfor fog particles near the axis, and smaller for particles near the topand bottom of the condensation chamber. Hence it is next necessaryto explain that the details of the distorted coronas observed actuallycorrespond with a gradation of the number of effective or availablenuclei, from the axis outward on all sides. In the case of linearlygraded fog particles increasing in diameter, 8, from bottom to top, itappears that the equation of the apertures, s, of the loci* of like colorof th
The nucleation of the uncontaminated atmosphere . pection of the coronas (figs. 2-6) shows that they are largerfor fog particles near the axis, and smaller for particles near the topand bottom of the condensation chamber. Hence it is next necessaryto explain that the details of the distorted coronas observed actuallycorrespond with a gradation of the number of effective or availablenuclei, from the axis outward on all sides. In the case of linearlygraded fog particles increasing in diameter, 8, from bottom to top, itappears that the equation of the apertures, s, of the loci* of like colorof the corona is So a sin (->(. + 2 a s0 sin 4>^ 80 j where s0 is the aperture for the particles of diameter, 80, in the horizonor plane of sight, and 8 the angle in polar coordinates between theradius vector to the part of the corona in question and the horizon-tal, the origin being at the center of the corona. Finally 8 = 80— coronas when the gradation becomes marked are campanulatein outline, finally becoming Fig. 7.—Computed curves. In the present case, however, there are two symmetrical distribu-tions of this kind, , increasing diameters of fog particles fromthe axis of the chamber toward the top and the bottom. Hencepairs of intersecting curves, two examples of which are given infigure 7 (« > a), show the coronas to be anticipated, if the remoteparts beyond b and c of the corona are ignored and only the strongercurves surrounding the spot of light, d, admitted. In other words, *Barus: Am. Journ. Sci. (4), XIII, p. 309, 1902. SOURCES OF NUCLEI. 9 as the distance, b c, varying with the number of axial nuclei and thedistribution constant, a, increases, all the figures, 2, 3, 4, 5, 6, may belogically evolved. On the left-end face, moreover, there would be special interferencewith the distribution of nuclei giving rise to the corresponding dis-tortion seen in the coronas. Further distortion due to the decreasefrom left to right of the intensi
Size: 2093px × 1194px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1906
