59 



Monthly and nniiual means of noonday readings of a Fahrenheit thermometer 

 whose hulh is i inch hvioir the surface of the soil /it Green icich Ohsercatory. 



1847 



1848 



1849 



1850 



1851... 



1853 



1854. 

 1855. 

 ia56. 

 1857. 



18«53. 

 1S«4. 



1866. 

 1867. 



1870. 

 1871. 



1872. 

 1873. 



■37.8 

 37.4 

 41.5 

 36.7 

 44.2 

 42.8 

 44.3 

 40.6 

 38.4 

 41.5 

 38.9 



42.4 

 40.9 

 :55. 5 

 40.7 

 43.2 

 39.6 

 .38.8 

 44.1 

 38.3 

 39.4 

 43.0 

 40.1 

 36.2 

 41.6 

 42.8 



38.0 



44.1 

 j 43.6 

 i 44.4 



42.7 

 I 42.0 



37.0 

 I 41.6 



! 3:^.4 

 4;i.3 



40.7 

 37.8 

 4:15 

 37.4 

 42.6 

 42.9 

 43.2 

 39.0 

 38.9 

 43.1 

 46.1 

 44.5 

 46.8 

 38.1 

 42.0 

 44.6 

 3fi.4 



42.9 

 44.6 

 44.3 

 41.9 

 44.0 

 43.0 

 41.8 

 45.3 

 41.0 

 41.7 

 43.7 

 42.2 

 47.3 

 42.1 

 44.6 

 45.6 

 45.0 

 43.2 

 39.3 

 42.0 

 40.7 

 45.9 

 40.8 

 42.5 

 4.5.0 

 45.0 

 42.4 



40.38 41.40 4125 49. -^l 



Apr. 



47.2 

 49.5 

 46.3 

 50.4 

 48.5 

 49.9 

 47.4 

 52.7 

 48.9 

 50.4 

 48.3 

 49.6 

 49.3 

 45.2 

 47.7 

 50.6 

 51.1 

 50.0 

 53.3 

 50.3 

 49.9 

 50.5 

 51.5 

 50.0 

 49.6 

 49.8 

 48.5 



May 



June. July- 



SB. 

 61.6 

 56.5 

 53.0 

 54.8 

 55.1 

 55.7 

 54.2 

 52.9 

 52.6 

 57.6 

 54.3 

 55.8 

 56.7 

 54.9 

 57.8 

 54.3 

 56.3 

 57.8 

 52.8 

 55.9 

 59.8 

 54.3 

 56.1 

 54.2 

 53.4 

 53.3 

 5-). 54 



61.1 



61.7 

 63.3 



64.1 

 62.2 

 59.4 

 62.3 

 59.8 

 61.3 

 63.0 

 6.5.6 

 68.6 

 64.4 

 58.2 

 63.2 

 60.0 



60.0 

 64.4 

 63.3 

 61.4 

 64.3 

 58.6 

 64.2 

 58.4 

 61.5 

 61.2 



62. 08 



67.4 

 65.0 

 65.0 

 65.2 

 63.8 

 71.0 

 63.2 

 64.4 

 65.6 

 64.8 

 67.0 

 64.5 

 70.7 

 61.3 

 64.6 

 62.6 

 64.0 



66.1 

 65.0 

 62.6 

 69.9 

 86.2 

 07.1 

 63.7 

 06.9 

 66.0 



Aug 



64.7 



60.8 

 65.2 

 63.0 

 65.5 

 6.5.2 

 64.1 

 64.6 

 66.0 

 66.7 

 67.9 

 66.0 

 66.7 

 60.4 

 66.2 

 &3.5 

 &3.9 

 62.2 

 62.5 

 61.7 

 64.1 

 66.7 

 63.2 

 6:3.8 

 66.6 

 63.9 

 65.2 



Sept. 



61.8 

 58.7 

 60.0 

 61.1 

 60.3 

 61.6 

 (50.9 

 59.0 

 62.5 

 62.7 

 59.7 

 57.0 

 60.3 

 60.6 

 57.6 

 59.5 

 65.6 

 59.0 



54.6 

 53.5 

 53.0 

 49.5 

 .54.7 

 50.2 

 55.1 

 52.9 

 54.7 

 54.5 

 55.2 

 54.2 

 54.4 

 52.4 

 57.5 

 54.3 

 54.3 

 54.0 

 54.7 

 5.5.2 

 52.6 

 52.2 

 52.4 

 52.9 

 52.0 

 50.8 

 51.4 



48.7 

 45.5 

 46.5 

 4S.7 

 41.2 

 .50.4 

 44.9 

 44.1 

 44.3 

 419 

 48.8 

 42.2 

 44.3 

 44.0 

 419 

 42.7 

 48.0 

 45.4 

 47.5 

 47.2 

 45.2 

 45.0 

 45.8 

 44.3 

 41.2 

 47.1 

 45.7 



Dec. 



44.5 



45.5 

 41.1 

 42.7 

 42.2 

 4S.0 

 38.0 

 42.9 

 38.3 

 41.9 

 46.6 

 42.4 



42.6 

 44.0 

 45.6 

 41.6 

 45.1 

 44.9 



47.0 

 40.5 

 38.1 

 39.2 

 43.0 



51.81 

 52.33 

 52.34 

 51.. 52 

 .51.98 

 53.18 

 51.18 

 52.06 

 50.47 

 51.94 

 53.57 

 52.01 

 53.15 

 49.62 

 .51.97 

 52.11 

 .52. .56 

 51.17 

 51.83 

 52.38 

 51.43 

 54.02 

 52.00 

 51.32 

 50.73 

 .52.36 

 51.11 



51.97 



SOIL TEMPERATURES OBSERVED AT BROOKINGS, S. DAK. 



Ainoiig- the agricultural experiment stations in the United States 

 whose work will be used in this preliminar.y report are some whose 

 observations of the temperature of the soil will be needed for com- 

 parison with the observations on the growth of plants and resulting 

 crops or for denfonstrations of the relations between the temperature 

 of the air and of the soil. The following table gives for Brookings, 

 S. Dak,, the daily maximum readings of the thermometer in the air 

 and shade, the daily rainfall, the maximum temperatures of the soil 

 at depths of 2 inches and 12 inches as far as published in Experiment 

 Station Bulletin No. C for a portion of the summer of 1888. These 

 figures show that in summer and for the growing season generally 

 the temperature of the soil near the surface is higher than that of 

 the air in the shade only when the sun shines on it, and that it is 

 lower than the temperature of the air in the shade only when the 

 radiation cools it at nighttime or when the rain falls in the daytime 

 and is for a short time followed by rapid evaporation. The average 



