id author title date pages extension mime words sentences flesch summary cache txt 36252 Rotch, Abbott Lawrence Sounding the Ocean of Air Being Six Lectures Delivered Before the Lowell Institute of Boston, in December 1898 .txt text/plain 35047 1423 60 Temperatures observed in Four High Balloon Ascents 91 Changes with Height recorded by Kites at Blue Hill 155 with the height attained by the Blue Hill kites, to be described found from the kite-observations at Blue Hill, that up to the height clouds indicate the direction and velocity of the air at different may be no clouds at all, in which case balloons or kites will aid us clouds at different heights, have been made at Blue Hill several times the height of a mile the mean decrease of temperature in the day-time with height observed during the four highest balloon ascents in Europe are utilized in the measurements of cloud-heights at Blue Hill. atmospheric pressure, air temperature, and relative humidity, was air up to heights of at least 12,000 feet whenever there is wind, but of temperature with height, so that the air at altitudes of from 300 ./cache/36252.txt ./txt/36252.txt