690 EXPERIMENT STATION RECORD. [Vol.38 



from December 1, 1914, to Noveinl)er 30, 1916, and continuing previous worli 

 (E. S. R., 36, p. 284). 



Land drainage: Some notes on open draining and points in pipe draining, 

 L. J. B. Grant and A. J. Faulkner (Jour. Agr. [New Zeal.], 15 (1917), No. 2, 

 pp. 91-95, figs. 5). — Brief notes on open surface drains and on subsurface pipe 

 drains for New Zealand conditions are given. 



Tile drainage for the farm, H. B. Walker (Bien. Rpt. Kans. Bd. Agr., 20 

 (1915-16), pp. 152-169, figs. 12). — Tliis is a brief discussion of tile drainage 

 with special reference to Kansas farms. 



The subsidence of muck and peat soils in southern Louisiana and Florida, 

 C. W. Okey {Proc. Amer. Soc. Civ. Engin., ^3 (1917), No. 7, pp. U99-1522, pi. 

 1, figs. 18). — The object of this paper is to call attention to the fact that in 

 designing drainage improvements it is often necessary to anticipate the sub- 

 sidence of muck and peat lands subsequent to drainage. The results of some 

 observations made in England on the subsidence of drained muck and peat 

 lands are reviewed, and the results of first-hand observations made in Louisiana 

 and Florida are reported in detail graphically. 



" It is clearly evident that in planning drainage improvements for areas 

 of deep muck land, some provision should be made for the gradual but certain 

 decrease in elevation of the surface. In relatively small districts, whei'e 

 drainage is secured by pumps, this decrease can be met easily by lengthening 

 tlie suction pipes on the pumps. As the drainage channels in such soft soils 

 require considerable maintenance in the earlier years of drainage, they can 

 be deepened accordingly. Where the land is drained by gravity, the elevation 

 of the vi^ater at the outlet is usually fixed, and a change in elevation of the 

 land to be drained will mean a revision of the hydraulic gradient in the main 

 drainage channels, with the consequent change in width and depth of the 

 channels." 



Leveling of old battle fields, M. Ringelmann (Jour. Agr. Prat., n. ser., SO 

 (1917), No. 10, pp. 178-180, figs. 2). — Methods and machinery for leveling battle 

 fields in France and preparing them for cultivation are described. 



Surface water supply of New Mexico, 1916, J. A. French (Santa Fe, N. 

 Mcx.: State Engin. Dept., 1916, pp. 146). — This report presents the results of 

 measurements of flow made on the Canadian, Gila, Mimbres, Pecos, Rio Grande, 

 Rio Tularosa, San Francisco, and San Juan River Basins and in Estancia 

 Valley, N. Mex., for 1916, continuing previous work (E. S. R., 37, p. 384), 



[Ground water studies in the Rio Grande and Socorro Valleys] (New 

 Mexico Sta. Rpt. 1917, pp. Sl-JfS, figs. 4). — Preliminary observations are re- 

 ported, together with maps and curves showing the behavior of the water 

 table. 



Surface waters of Vermont, C. H. Pierce (U. S. Geol. Survey, Water-Supply 

 Paper 424 (1917), pp. 218, pis. 10, figs. 2, maps If). — This report, prepared in 

 cooperation with the State of Vermont, describes the general features and gives 

 the results of flow measurements made on streams in the St. Lawrence and 

 Connecticut River Basins of Vermont. A gazetteer of the streams of the State 

 is appended. 



Analyses of mineral and potable waters, A. M. Peter, S. D. Averitt, and 

 .L S. McHargue (Kentucky Sta. Rpt. 1915, pt. 1, pp. 49-72). — Analyses of 57 

 samples of potable and mineral waters from 29 counties in Kentucky are 

 reported. 



Mineral springs of Alaska, G. A. Waring (U. S. Geol. Survey, Water-Sttpply 

 Paper 4I8 (1917), pp. II4, pis. 6, figs. 16, maps 3). — This report denls with the 

 mineral springs of Alaska, with particular reference to their hygienic value. 



