STATISTICS MISCELLANEOUS. 395 



and outside of the refrigerator during 20 days. From these data the factor for radia- 

 tion was calculated to be 4.25, "that is, 4.25 units of heat were absorbed through 

 1 sq. ft. of wall, floor, or ceiling in 24 hours for each degree of difference in tempera- 

 ture between the outside and inside air." Observations were also made with what 

 is termed the Hanrahan system, the essential feature of which is that the ice house 

 is in connection with the refrigerator, so that there is a complete circuit of air. 

 " The air of the refrigerator, having been warmed by the products stored therein, 

 ascends a flue between the two parts of the building and at the top of the flue 

 jiasses over into the ice house, where it is cooled and gradually falls to the floor. 

 The ice rests on large slats at the floor and the air is drawn 1)elow the ice between 

 these slats toward the refrigerator, and thus the circuit is completed." Observa- 

 tions during 22 days on a cold-storage system of this character, the ice house being 

 12 X 12 X 20 and the refrigerator 12 X 10 X 7, showed that the average temperature 

 outside of the refrigerator was 68.5°; inside, 43.3°; of the dead-air space, 56.4°. It is 

 thus clear that in order that this system may be effective and economical of ice, it is 

 essential that the insulation should be as perfect as possil)le. 



The quantity of water used in irrig-ation and the seepag-e loss from canals, 

 S. FoRTiER ( Montana Sta. Bui. 29, 2>P- 44, i>?-'*- JO). — This is an account of investiga- 

 tions made during 1900 in cooperation with this Office under supervision of Elwood 

 Mead, expert in charge of irrigation investigations. Records are given of observa- 

 tions on the amount of water actually used in different cases in the Gallatin and 

 Bitter Root valleys and in Yellowstone County, and on the duty of water in Middle 

 Creek Canal. A study of the losses due to seepage and evaporation on 5 canals and 

 their relation to the duty of water is also reported. " In addition to these investi- 

 gations it was thought desirable to institute a second series of experiments for the 

 purpose of determining the proper amount of water to apply to growing crops and 

 the i^roper time tf) irrigate. It is intended that thi3 series will extend through a 

 period of at least 5 years, during which time the staple crops of Montana can be 

 experimented on with the object of finding out how much water is necessary to 

 produce the most valuable yields and the right time to apply it." The results with 

 oats in 1900 are reported, but on account of the unusually dry season no conclusions 

 are drawn. 



A loss from evaporation and seepage of as much as 34.7 per cent of the total supply 

 of water in a canal is reported and the conditions affecting seepage are discussed. 



STATISTICS^MISCELLANEOUS. 



Sixteenth Annual Report of Maine Station, 1900 {Maine Sta. Rpt. 1900, pp. 

 228). — This is made up of reprints of Bulletins 59-69 of the station on the following 

 subjects: Feeding-stuff inspection (E. S. R., 12, p. 377), fertilizer inspection (E. S. R., 

 12, p. 324), notes on insects and plants (E. S. R., 12, pp. 312, 367), the Maine Experi- 

 ment Station (E. S. R., 12, p. 599), feeding-stuff inspection (E. S. R., 12, p. 587), 

 poultry experiments in 1899 (E. S. R., 12, pp. 585, 586), coffee substitutes (E. S. R., 

 12, p. 586), nut oils (E. S. R., 12, p. 516), testing grass seed (E. S. R., 12, p. 565), 

 potato pomace (E. 8. R., 12, p. 587), fertilizer inspection (E. S. R., 12, p. 737) , digestion 

 experiments with sheep (E. S. R., 12, p. 873), experiments with insecticides upon 

 potatoes (E. S. R., 12, p. 863), and finances— meteorology— index (E. S. R., 13, p. 290). 



Thirteenth Annual Report of Massachusetts Station, 1900 {Massachusetts 

 St<t. Rpt. 1900, pp. 132). — This contains a brief summary of station work during the 

 year, including a list of the officers of the station and a list of station publications now 

 available for distribution; a financial statement for the fiscal year ended June 30, 

 1900; and reports of the chemists, botanists, entomologists, meteorologist, and agri- 

 culturist, outlining the work in their respective departments and giving accounts of 

 investigations noted elsewhere. 



