1034 EXPERIMENT STATION RECORD. 



filtration is to be efficient (a suitable subsoil being assumed), is somewhere about 

 1,000 millions. . . . If a sufficient number of such mechanical analyses were avail- 

 able for reference, they would afford excellent data as to the volume of sewage of 

 given nature and strength which any particular soil might reasonably be expected to 

 purify." 



The results of a study of the different soils with reference to the amount of lime 

 dissolved in 48 hours by water saturated with carbon dioxid and in 24 hours by water 

 alone ••indicate that a soil does not require to be rich in lime for nitrification to go 

 on actively in the treatment of an ordinary sewage." 



The bacteriological examinations lead to the conclusion that lanfl treatment of 

 sewage does not so modify the biological qualities of sewage as to make it safe to dis- 

 charge the effluents into drinking-water streams, although sufficiently purified to be 

 discharged into nondrinking-water streams. The intrinsic biological qualities of 

 sewage are not materially modified by land processes of sewage disposal. The 

 bacterial flora of the soil on sewage farms is apt to resemble that of sewage associ- 

 ated to a greater or less decree with characteristic soil organisms. The bacterial 

 flora of the effluents is characteristic of that of the sewage, not of that of the soil. 



MISCELLANEOUS. 



Fifteenth Annual Report of Arizona Station, 1904 (Arizona Sta. Rpt. 1904, 

 ji/i. $65-498). — This includes the organization list of the station; a report of the 

 director; a financial statement for the fiscal year ended June 30, 1904; and depart- 

 mental reports, parts of which are abstracted elsewhere. 



Twenty-second Report of California Station, 1904 (California Sta. Rpt. 1904, 

 pp. 228). — This includes the organization list of thestation; a financial statement for 

 the fiscal year ended June 30, 1904; a general report on the work of the station by 

 the director; a report on farmers' institutes by E. J. Wickson; lists of exchanges and 

 station publications; and reports of the different divisions of the station and of the 

 substations, parts of which are abstracted elsewhere. 



Sixteenth Annual Report of Connecticut Storrs Station, 1904 (Connecticut 

 Starrs Sta. Rpt. 1904, pp. 250). — This contains the organization list of thestation; a 

 list of available station publications; a financial statement for the fiscal year ended 

 June 30, 1904; reports of the director and heads of departments; and a number of 

 articles, which are abstracted elsewhere in this issue. The report also contains several 

 articles which have already been abstracted from other sources, as follows: The food 

 value of a pound of milk solids in milk poor and rich in fat content (E. 8. R., 16, 

 p. 806); protecting cows from flies (E. S. R., 16, p. 814); discussion of the amount 

 of protein required in the ration for dairy cows (E. S. R., 16, p. 911); and a success- 

 ful brooder house (E. S. R., 16, p. 908). 



Annual report of Nevada Station, 1904 ( Nevada Sta. Rpt. 1904, pp. 42). — This 

 contains a brief statement by the board of control; a report of the director reviewing 

 in a general way the work of the station during the year; a financial statement for 

 the fiscal year ended June 30, 1904; and departmental reports presenting information 

 on the different lines of station work, including notes on forage plants, orchard fruits, 

 trees, animal diseases, weather conditions, field crops, vegetables, etc. A list is given 

 of the varieties of apples, pears, plum, cherries, quinces, apricots, and mulberries 

 grown at the station, together with a record of the irrigation of the station orchard. 

 The varieties planted in the arboretum in the spring of 1904 are listed and a monthly 

 record is given of 2 grade Holstein cows. The animal diseases studied during the 

 year included the sheep disease known as big head and anthrax, glanders, hog cholera, 

 and swine plague. 



Imports of farm and forest products, 1901-1903 (U. S. Dept. Agr., Bureau 

 of Statistics Hal. 31, pp. 66). — The total value of the farm products imported in 1903 

 was $456,199,325 and the forest products §71 ,478,022. Detailed tables are given which 

 show the kind, quantity, value, and source of the different products. 



