Influence of Intensive Desiccation on Certain Physical Properties of Benzene.

deviations, in both the original counts and the numbers after reduction to magnitude 18.2. These deviations indicate the conspicuous nonuniformity in the distribution of galaxies throughout the region covered by the survey. The irregularities are so great from field to field that perhaps no conclusion should be drawn concerning the progression of average density with galactic latitude. The greater richness of the northern galactic hemisphere is as obvious here as in the earlier survey to the thirteenth magnitude. North of latitude +400 the average number per square degree to magnitude 18.2 is 17.8; south of -40° it is 12.6. The difference may be partially the result of our location north of the galactic plane, but the large deviations from region to region show that little trust can be placed in quantitative deductions based on these values. Figure 2 shows the relation of density to galactic latitude and longitude for the individual regions. An area on the chart is proportional to the corresponding surface area, a result obtained by making the radii of the boundary lines of the various latitude zones proportional to V/1 sin 0. The densities are the unreduced values, and illustrate again the unevenness in distribution over the sky and the absence of galaxies in regions near the Milky Way.