Hour Sunrise 9 a.m. 3 p.m. 9 p.m. TEMPERATURE Mean 57.6 74.0 77.6 64.5 Max. 62.0 81.0 87.5 68.7 Min. 53.5 63.5 71.0 60.0 Range 8.5 17.5 16.5 8.7 WET-BULB Mean 51.7 59.5 59.9 55.5 Max. Depression 8.5 18.5 26.0 12.5 Min. Depression 3.8 4.0 6.8 2.5 Elasticity of Vapour .352 .382 .357 .370 DEW-POINT Mean 46.1 48.5 46.4 47.5 Max. 53.6 56.7 60.0 55.6 Min. 40.6 38.0 36.0 41.0 Max. Depression 16.9 33.5 44.2 24.1 Min. Depression 7.0 6.8 11.0 4.4 Weight of Vapour in cubic feet 3.930 4.066 3.658 4.014 SATURATION Mean .680 .460 .352 .572 Max. .787 .818 .703 .860 Min. .566 .338 .237 .452 Number of observations 10 8 9 10 Extreme variations of Temperature 34.0 degrees Extreme variations of relative humidity .623 Extreme diff. Solar and Nocturnal Radiation 80.5 degrees NOCTURNAL RADIATION SUNRISE Exposed Th. On Earth On Grass Temperature 53.2 54.0 51.5 Mean Diff. from Air 4.5 3.7 6.2 Max. Diff. from Air 8.5 9.0 7.5 Number of Observations 9 9 8 NINE P.M. Exposed Th. On Earth On Grass Temperature 59.9 60.7 56.4 Mean Diff. from Air 4.6 3.8 8.1 Max. Diff. from Air 11.5 10.5 13.5 Number of Observations 10 10 10 SOLAR RADIATION MORNING Time Temp. Black Bulb Diff. Phot. 9 a.m. 70.0 125 55.0 10.300 11 a.m. 81.0 119 38.0 10.230 10.30 a.m. 71.5 126 54.5 10.300 10 a.m. 72.0 117 45.0 10.220 10 a.m. 80.0 122 42.0 ... 10.30 a.m. 78.0 128 50.0 ... ---------------------------------------------------- Mean 75.4 122.8 47.4 10.262 AFTERNOON Time Temp. Black Bulb Diff. Phot. 4 p.m. 76.5 90 13.5 ... 3 p.m. 80.0 105 25.0 10.210 3 p.m. 76.0 102 26.0 10.170 3 p.m. 87.5 126 38.5 ... ---------------------------------------------------- Mean 80.0 105.7 25.7 10.190 NOCTURNAL RADIATION FROM PLANTS