380 EXPERIMENT STATION" BECOED. [Vol, 41 



While the ditch was completed early in 1917 and the season was very dry, 

 great fluctuations in the compositioii of the drainage water are noticeable. 

 " March 9 the water, which had hitherto been hard, was alkaline, containing 

 3.4 parts per 100,000 of black alkali; but the following month, April 10, it was 

 again found to be as hard as it had been the previous November. The analysis 

 made in February seems to indicate that the permanent hardness of the water 

 was decreasing at that time. During the summer months the hardness remained 

 fairly constant, but increased three or four fold in September, then became 

 neutral in October and again strongly black alkaline in December, which is the 

 last analysis available. 



" The total solids dissolved in the water and the chlorids showed similar 

 fluctuations. September 15 both total solids and chlorid reached a maximum, 

 but dropped abruptly to about one-half that amount in October. This period 

 of high solids and chlorids was accompanied by very high permanent hardness. 

 In November and December the temporary hardness ('lime') increased to 

 double the a\'erage for the other months of the year, which had been nearly 

 uniform. . . . 



" The present fluctuations . . , are probably due to changes in the amount of 

 seepage from various areas according to the amount of irrigation, and also to 

 overflow reaching the ditch which would tend to dilute the usual seepage flow. 

 At no time has the drainage water been entirely satisfactory for irrigating 

 purposes on account of its high salt content." 



Public Roads (U. 8. Dept. Agr., Public Roads, 1 (1919), Nos. 11, pp. 40, figs. 

 23; 12, pp. U, flgs. 25; 2 (1919), Nos. 13, pp. 36, figs. 20; U, pp. 40, figs. 29).— 

 These numbers of this periodical contain miscellaneous notes and the following 

 articles : 



No. 11. — New Roads Official Named ; The Engineer in Road Work, by R. 

 Wiley; Typical Specifications; New Regulations for Vouchers for All Federal- 

 Aid Projects; 6,146,617 motor vehicles in U S., by A. P. Anderson (see p. 3S3) ; 

 Building an Arizona Project; Bureau of Public Roads in the War; Federal- 

 Aid State Maps ; Pennsylvania Sees End of Mud Age, by W. (i. Sproul ; Use of 

 Calcium Chlorid as Dust Preventive for Gravel Roads, by W. L. Ulrich ; Use 

 of Sand Clay from Salt Flats in Surfacing Texas Roads, by R. H. Phillips; Use 

 of Labor-Saving Devices in Concrete Road Construction, by L. I. Hewes ; The 

 Master Record of Federal Aid ; Februaiy Federal- Aid Allowances ; and Tests 

 of Road Building Rock in 1918. 



No. 12. — Some Reasons for Success and Failure of Bituminous IMacadam, by 

 F. C. Pillsbury ; Water and the Subgrade, by .7. L. Harrison ; Convenient Project 

 Record ; Report on Rural Concrete Roads ; Notes and Suggestions for Inspec- 

 tors on the Construction of Concrete Pavements ; Memorandum on Construction 

 of Concrete Roads, by L. I. Hewes ; Federal-Aid Record Shows Big Road- 

 Building Program ; Thickness of Concrete Slabs, by A. T. Goldbeck (see p. 381) ; 

 and Determining Sizes of Culverts, by O. L. Grover (see p. 381). 



No. 13. — Colorado's First Federal-Aid Road, by C. E, Learned; Mountain 

 Highway Reconnaissance, by T. A. Bedford ; April Federal-Aid Projects Exceed 

 Previous Records; Life's Pathway, by A. D. Williams; Arizona One of the 

 Pioneer States to Utilize Convict Labor on Its Roads and Bridges, by B. M. 

 Atwood ; Building Oklahoma State Roads With Convict Labor, by H. C. Smith; 

 Florida Has Efficient State Convict Road P^)rce, Plans to Use It on Higher 

 Type of Construction, by W. F. Cocke ; Maryland's Governor Believes Work on 

 Roads in Line with Ideas of Proper Treatment of Convicts, by E. C. Harrington ; 

 Illinois Uses Convicts in Preparing Material, by C. Older; Ijouisiana Finds 

 Work of Convicts Satisfactory, Cost of Construction Less Than With Free 

 Labor, by D. Buie ; Experience Gained on Rhode Island Roads Makes Ex-convicts 



