Elasticity of Vapour .276 .264 .248 .248 DEW-POINT Mean 39.5 37.9 36.0 36.1 Max. 52.0 52.7 46.8 50.0 Min. 23.3 24.5 24.3 *9.1 Max. Depression 31.7 39.2 48.4 56.9 Min. Depression 10.4 24.3 34.9 16.2 Weight of Vapour in cubic feet 3.088 2.875 2.674 2.745 SATURATION Mean .550 .330 .260 .410 Max. .680 .450 .320 .590 Min. .330 .260 .190 .140 Number of observations 7 7 7 10 Extreme variations of Temperature 35.4 degrees Extreme variations of relative humidity .540 Extreme diff. Solar and Nocturnal Radiation 96.5 degrees *Taken during a violent N.W. dustt-storm. SOLAR RADIATION MORNING Hour Th. Black Bulb Diff. Phot. 9.30 a.m. 77.0 130 53.0 ... 10 a.m. 69.5 124 54.5 10.320 10 a.m. 77.0 137 60.0 ... 9 a.m. 63.5 94 30.5 10.230 9 a.m. 61.2 106 44.8 ... 9 a.m. 67.0 114 47.0 10.350 --------------------------------------------------- Mean 69.2 117.5 48.1 10.300 AFTERNOON Hour Th. Black Bulb Diff. Phot. 3.30 p.m. 81.7 109 27.3 ... 3 p.m. 80.5 120 39.5 10.320 3 p.m. 81.5 127 45.5 10.330 3.30 p.m. 72.7 105 32.3 10.230 3 p.m. 72.5 110 37.5 10.390 --------------------------------------------------- Mean 77.8 114.2 36.4 10.318 NOCTURNAL RADIATION SUNRISE Exposed Th. On Earth On Grass Temperature 51.1 48.3 46.6 Mean Diff. from Air 4.0 2.5 6.2 Max. Diff. from Air 9.0 3.7 9.0 Number of Observations 6 3 5 NINE P.M. Exposed Th. On Earth On Grass Temperature 56.4 53.8 54.4 Mean Diff. from Air 5.3 4.9 7.2 Max. Diff. from Air 7.5 5.5 10.0 Number of Observations 7 6 7