394 



EXPERIMENT STATION RECORD, 



potash was not increased at all, and Imt slightly when the mixture was 

 kept moist. That superphosphate often produces better results than 

 raw phosphate the author regards as sometimes due to the fact that 

 the former renders soluble in the soil a larger amount of i)otash than 

 the latter. 



When nitrate of soda was added and the earth kept dry the increase 

 in the sohible potash was 0.0971 gm. ; when moistened, 0.1433 gm. in a 

 kilogram of soil. These ([uantities are eijuivaleut to 777 and 1,140 kg., 

 respectively, in 8,000,000 kg. of soil. The nitrate of soda also rendered 

 soluble a large quantity of lime and magnesia. Of all the fertilizing 

 materials tested nitrate of soda was most active in making potash, 

 lime, and magnesia soluble. For soils rich in potash, as in strong clay 

 soils and in others, the author considers it unnecessary to apply potash 

 fertilizers when sui^erphosphate and nitrate of soda are emjiloyed as 

 fertilizers. 



Soil temperatures, T. Cannelin {Mustiala Agl. CoUege Bpf. 1892, 

 pp. 50-(14). — Observations of soil temperatures were made during 1802 in 

 3 different places and at 3 different depths in the soil. The stations 

 were located as follows: (1) Near a marsh on moist, gravelly soil which 

 had been in pines for 130 years; (2) on a clearing of about 7i acres, 

 about 1,000 ft. from station 1, sparsely grown with small pme, fir, and 

 birch; and (3) on a drier soil in 40-yearold birch, aspen, and fir. 



The temperature was observed at depths of 0.5, 1, and 2 meters, 

 observations being taken every day at a. m. 



The monthly averages of the 9 different temperature readings are 

 shown in the following table : 



Average readings of soil thermometers. 



Thernioiiieter out of orilor. 



-F. W. WOLL. 



Analyses of well waters. F. T. Shutt (Canada Exptl. Farms Bpt. 1S93, j)p. 

 151-154) — Tabulated analyses with reference to sanitary condition of 34 samples of 

 well water from different ]Kxrts of the Dominion of Canada. 



A simple method of detecting fecal contamination in drinking VT^ater, H. 

 NOKDLINGER (Fliarm. Central Hallc, 1S94, No. S; abs. in Ztschr. laudw. J'er. Hessen, 



