In a previous paper, the author dealt with the problem of solar radiation over the earth's urface assuming no atmosphere existed. The earth we live on is, however wrapped in a blanket of gas through which the sun's ray penetrate, gradually decreasing its intensity. Therefore, radiation conditions become more complicated and the previous study becomes only a rough approximation, utilized in order to simplify mathematical analysis of the problem. If the actual features of solar radiation were greatly altered by the existence of the earth's atmosphere, the previous study would be without practical value. In such a reason an approach toward the actual earth is ernestly schemed. This paper consists of two parts; the following subjects are discussed. Part 2. Meridional distribution of solar radiation over an atmosphere-covered earth. 1) Quantity of radiation over the earth as a whole. 2) Total amount of radiation on selected days at every five degrees of latitude. 3) Total radiation during selected intervals at every ten degrees of latitude. Part 3. Meridional distribution of effective radiant energy. Part 2 Together with the quantity of radiation received all over the earth (Table 1. ), the daily amount of radiation coming through the atmosphere with the transmission coefficient p=0.6 and 0.8 on twenty-four selected days is computed by graphical integration. For determining the area on the graph, Simpson's formula is used instead of a planimeter because it has proved more accurate in a tentative study. Assuming the meridional curves of daily radiation (Fig. 1) to be parabolas, the latitudes with maxium amounts are obtained on shirteen representative dates. A portion of the results are shown in Table 2. Similarly, the total radiation coming through the same atmos-phere during the selected intervals of time and latitude with their maximum amounts are calculated in the same way and shown hn. Table 3. Part 3 The previous studies are restricted to incoming solar radiation, but, at the same time, the earth and its atmosphere send out long wave radiation to outer space. Therefore, the effective energy utilized is the difference between them, the incoming radiation subtracted from the outgoing. On these quanti-ties, Simpson, Baur and Philipps have made studies considering the effects of cloud reflection and sky radiation and computed the amounts at every ten degrees of latitudes in both hemispheres. After Simpson's data, meridional distribution of effective energy in June, July and August is shown in Fig. 4. From the above study, it is quite clear that the total amount of radiation during the growing season is always greatest at latitudes 30°_??_40° and in the long run, is nearly equal to that on the earth with no atmosphere. This is an important fact and its geographical meanings described in an, earlier paper are completely verified. It is concluded that the climatic superiority of the middle latitudes is due not only to the moderate temperatures and plentiful rainfall throughout the year, but also to the abundant solar energy concentrated during the shorter intervals of the growing season. The author is obliged to abandon concrete description and merely add the numerical tables of results for economy of space. The details of the whole work will be given out after further study in the near future.