62 
Hatremes and means of soil temperatures for 1889, ete.—Continued. 
Jan. | Feb.| Mar. Apr. May. June. July. Aug.|Sept.| Oct. Noy. | Dec. 
| | | | | 
| | ee ay 
Soil temperature. | | 
| 
SANDY SOIL ON A HILL; | | | 
OFTEN CULTIVATED | 
DURING CROPS. 
3-inch depth: OFF | SeRE SW CUBE, |OUR Soir a (40 Fran CHa Oe Hi oa RCe Aiea GO 8 Lel\ Oli Ten cle 
Maxine eee eee | 63.5 | 69.0 | 73.5 | 82.5 | 9205 | 96.0 {101.5 | 95.0 | 96.5 | 84.5 | 69.5 | 69.0 
Minimum ....-------- | 38.5 | 32.0 | 37.0 | 48.5 | 52.0 | 52.0 | 71.5 | 69.5 | 54.5 | 45.0 | 35.0 | 35.0 
6-inch depth: | | | | | 
Maximum............| 61.0 | 76.5 | 68.5 | 79.5 | 89.0 | 92.0 | 98.0 | 92.5 | 92.5 | 82.5 | 68.5 | 65.0 
Manimum~ Jo feos! 35.5 | 34.5 | 39.0 | 50.0 | 55.0 | 56.0 | 73.5 | 70.5 | 57.5 | 48.0 | 37.0 | 37.5 
24-inch depth: | | 
Maximum. .........-- | 52.5 | 57.0 | 58.5 | 67.0 | 76.5 | 80.0 | 86.0 | 82.0 | 89.5 | 74.0 | 65.5 | 60.0 
Minimum __..______-- | 46.5 | 44.0 |.49.0 | 58.0 | 64.5 | 68.5 | 77.0 | 78.0 | 72.0 | 62.5 | 52.0 | 50.0 
48-inch depth: | | | 
Maximum.__._____._- | 58.5 | 53.0 | 56.5 | 63.0 | 71.5 | 75.0 | 79.5 | 79.0 | 84.5 | 74.5 | 69.0 | 60.5 
Minimumee ee SLB | 48.0 | 50.5 56.5 | 63.0 | 69.5 74.5 | 77.0 | 75.0 67.0 | 58.0 | 56.5 
96-inch depth: | | | | 
Maximum ___...__---- 59.5 | 56.5 | 56.0 | 60.5 | 62.5 | 69.0 | 73.0 | 73.5 | 76.5 | 74.5 | 70.0 | 65.0 
Ivana eee eee 56.5 | 54.5 | 54.5 | 54.0 | 60.0 | 65.5-| 69.0 | 73.0 | 78.5 | 70.5 | 64.0] 62.0 
BOTTOM LAND ON BANK | 
OF SMALL STREAM. | | | | 
| 
3-inch depth: 
Mikbahanphe ese 60.5 | 67.0 | 69.0 | 80.5 | 92.5 | 95.0 |101.0 | 96.0 | 96.0 | 84.5 | 71 69.5 
Wkbokberpbo So. 5. a= 39.5 | 35.0 | 41.5 | 47.5 | 55.0 | 55.0 | 74.0 | 70.5 | 56.5 45 34.0 | 34.0 
6-inch depth: 
Maslin) ese ne | 98.5 | 65.0 | 66.5 | 79.5 | 88.0 | 91.0 | 97.5 | 93.0 | 92.0 | 82.0 | 69.0 | 65.0 
Minimum -._.--....--| 39.0 | 38.0 | 44.0 | 52.0 | 59.0 | 58.0 | 76.0 | 73.0 | 60.0 | 49.0 | 37.0 | 36.0 
24-inch depth: | 
Maximum os: 262222 54.0 | 57.5 | 58.0 | 67.5 | 76.0 | 80.0 | 85.5 | 82.0 | 82.5 | 74.5 | 66.0 | 60.0 
Manimagomn 252252242 == 48.5 | 46.0 | 51.0 | 58.5 | 65.0 | 69.5 | 77.0 | 48.5 72.5 | 63.0 | 52.5 | 50.C 
48-inch depth: | | | 
Maximum. ...-------| 54.5 | 54.0 | 57.0 | 64.0 | 71.0 | 75.0 | 79.5 | 79.0 | 79.0 | 75.0 | 68.0 | 61.¢ 
Minimum .---2222.-_-|/ 52.5 | 5005 5165 | 57%2/0|63:5 1169550) 1425) | 7 On. 0G. 5 15920 | 57. 
SOIL TEMPERATURES OBSERVED AT PENDLETON, OREG. 
Among the United States experiment stations for which soil tem- 
peratures have been published, I quote the following observations 
made by Mr. P. Zahner, voluntary observer at Pendleton, Oreg., (lat. 
45°.7 N.; long. 112°.2 W.; altitude, 1,122 feet), because it represents 
a climate so different from that found in the same latitude east of the 
Rocky Mountains. A number of observations of diurnal periodicity 
are given by Zahner, and a shorter series is at hand for Cor- 
vallis, Oreg. (lat. 44°.5 N.; altitude, 150 feet). The comparison 
between these shows that the Pendleton air and soil are appreciably 
warmer than the Corvallis in July, August, and September, but colder 
in November and probably also in December. In general the maxi- 
mum soil temperature at Pendleton at all depths follows that of the 
