of humidity, saturation being considered 100; the smallest number indicating the driest month is 40, in June, and the largest, 80, is in January. The weight of a cubic foot of air under its pressure, temperature, and humidity, at 9 a.m., is shown in column 19.
The most prevalent wind in January was W., and the least prevalent wind was S.W. In February the most prevalent were E., S.W., and W., and the least prevalent was S. In March the most prevalent were W., S.W., and N.W., and the least were N. and E. In April the most prevalent was N.W., and the least was S. In May the most prevalent was N.W., and the least were E., S.E., and S. In June the most prevalent was N.W., and the least prevalent was S. In July and August the most prevalent were N.W. and W., and the least were N., N.E., E., S.E., and S. In September the most prevalent was N.W., and the least was S. In October the most prevalent were E., N.W., and W., and the least were S.E. and S. In November the most prevalent were N.E. and E., and the least were S.E. and S.; and in December the most prevalent winds were N.E., E., and S.W., and the least prevalent were S. and N.W. The most prevalent wind for the year was N.W., which occurred on 96 times during the year, of which 17 were in July, 16 in August, and 15 in June; and the least prevalent wind was S., which occurred on only 6 times during the year, of which 2 were in both January and March, and 1 in both April and May. At Sarona the most prevalent wind for the year was S.W., which occurred on 69 times during the year, and the least prevalent wind was E,, which occurred on only 5 times during the year.
The numbers in column 28 show the mean amount of cloud at 9 a.m.; the month with the smallest is August, and the largest, March. Of the cumulus, or fine weather cloud, there were 43 instances in the year, of which 9 were in July, 8 in August, and 7 in both May and September. Of the nimbus, or rain cloud, there were 42 instances, of these 9 were in both January and February, and 8 in March. Of the stratus there were 2 instances; of the cirrus, 2 instances; of the cirro stratus, 26 instances; of the cirro cumulus, 40 instances; of the cumulus stratus, 72 instances; and 138 instances of cloudless skies, of which 23 were in August, 22 in June, and 19 in July. At Sarona there were 119 instances of cloudless skies, of which 20 were in June, 14 in December, and 12 in both July and October.
The largest fall of rain for the month in the year was 9·51 inches in February, of which 3·35 inches fell on the 25th. The next largest fall for the month was 6·55 inches in January, of which 343 inches fell on the 5th. No rain fell from May 17th to October 30th, making a period of 165 consecutive days without rain. The fall of rain for the year was 31·69 inches, which fell on 63 days in the year. At Sarona the largest fall of rain for the month in the year was 5·00 inches in December. No rain fell at Sarona from May 11th to October 30th, making a period of 171 consecutive days without rain. The total fall of rain for the year at Sarona was 20·09 inches, which fell on 66 days during the year.
