1917] RURAL ENGINEERING. 385 



deal with the I'eclamation of tidal marshes and the Virginia drainage law. 

 Fourteen references to literature bearing on the subject are appended. 



[Land drainage in] Ontario, J. R. Spky (Agr. Gaz. Canada, 4 (1911), No. 3, 

 pp. 190, 191 ) . — Experimental tile drainage of five plats of loam soil in Ontario, 

 Canada, was found to increase the yields of wheat, oats, barley, and hay on 

 the average In 1916 by an amount worth $12.44 per acre, which exceeded one- 

 third the total cost of the drainage system. On clay soils the average increase 

 was less, being $4.61 per acre. No increase due to drainage of heavy day 

 soils was obtained during 1914, 1915, or 1916. 



Institutional sewage plants, C. F. Mebus (Amer. Jour. Pub. Health, 7 (1911), 

 No. S, pp. 296-298). — The general requirements for the proper operation of in- 

 stitutional plants for the purification and disposal of sewage are outlined. 



New stump burner for logged-ofE lands requires no blower, L. W. Allison 

 (Enxjin. Rec, 15 (1911), No. 13, pp. 495, 496, fig. 1).—A new stump burner is 

 described and illustrated. 



" In contrast with the closed type of hood burner, this stump burner consists 

 of a metal housing with various apertures for particular service, with smoke 

 pipe connection at the top. It is constructed in sections to provide for any 

 class of service, covering both large and small stumps. 



" By the use of movable draft pipes arranged around and near the base of the 

 burner, it eliminates the necessity for any blower or other artificial draft 

 device, the required draft being brought about by natural conditions and hood 

 construction, and in a highly efiicient manner for the service designed. While 

 this burner operates more slowly through the use of natural draft, demanding 

 greater periods of time for stump consumption, the operating cost is reduced to 

 a minimum, the primary expense being that of labor and attendance, which is 

 low when a number of burners are in operation on the same land at the same 

 time. . . . Recent tests on Washington timber lands show that this type of 

 stump burner will consume stumps from 3 to 5 ft. in diameter, together with 

 roots within the range of the burner, in a period of 24 hours, while larger 

 stumps from 6 to 7 ft. are burned in 30 or 40 hours." 



Tenth annual report of the board of county road commissioners of Wayne 

 County [Mich.], 1916 (Ann. Rpt. Bd. Road Comrs. Wayiie Co. [Mich.'\, 10 

 (1916), pp. 81, pi. 1, figs. 19). — This reports the work and expenditures of the 

 board of road commissioners of Wayne Co., Mich., on road construction, espe- 

 cially concrete roads, for the year ended September 30, 1916. 



First annual report of the commissioner of highways [of Oklahoma], 

 1915, G. B. Noble (Ann. Rpt. Comr. Highways Okla., 1 (1915), pp. 19, pi. /). — 

 This is a report, in manuscript, of the work and expenditures of the office of 

 the commissioner of highways of Oklahoma on the construction, maintenance, 

 and cost of highways in the State for the year ended December 81, 1915. 



Second annual report of the state engineer [of Oklahoma], 1916, M. L. 

 Cunn:ngfjam (Ann. Rpt. tState Engin Okla., 2 (1916), up. ;?6).— This is a mimeo- 

 graphed report of the work and expenditures of the Oklahoma State engineer's 

 office pertaining to the construction, cost, and maintenance of highways in the 

 State during the fiscal year 1915-16 and for the calendar year 1916 up to 

 December 1. 



Annual report on highway improvement, Ontario, 1914, W. A. McLean 

 (Ann. Rpt. Highway Improv. Ontario, 1914, pp. 223, figs. 68). — This report has 

 special reference to the work of road and bridge construction carried on by the 

 several counties of the Province of Ontario during the year 1914. It includes 

 appendixes on county road inspection, testing of materials, nonasphaltic road 

 oils, and traffic census statistics. 

 5750°— 17 No. 4 7 



