828 EXPERIMENT STATION RECORD. 



of floods in Hunter River and suggests the following remedial and preventive meas- 

 ures: "(1) Intelligent control of ringbarking or felling; . . . (2) repair of little 

 incipient rivulets by gradual replanting or placieinent of obstructions (logs, etc.); 

 {'.]) i)lanting of willows and other trees, shrubs, grasses, etc.; (4) chamfering of the 

 banks; (5) fencing of banks; and (6 ) l)urning as much as jwssible of the dead timber 

 and branches to prevent their finding their way into the water-courses and scouring 

 the banks." 



The composition of sewage in relation to problems of disposal, G. W. 

 Fuller {Tech. Quart., IG [IHOS), No. 2, iip. 132-160). — From a review of investiga- 

 tions relating to this sul)ject the author reaches the conclusion that it is " question- 

 able whether the amount of added knowledge which may be obtained from a con- 

 tinuance of present methods year after year is going to be connnensurate witli the 

 cost. In fact, it seems that th« time is approaching when it is worth while to con- 

 sider a recasting of the program for sewage analyses. . . . 



"In studying exhaustively the chemical and biological changes which take place 

 in polluted waters, and the conditions under which putrefaction may be avoided, 

 it is believed that the relative significance should be studied of the 'absolute oxygen- 

 consuming powers' of the organic matter in sewage or effluent expressed in terms 

 which can be readily appreciated; of the oxygen dissolved in the sewage or effluent, 

 together with that which maybe yielded by nitrates, sulphates, and other constitu- 

 ents of thelifpiid; of the oxygen similarly contained in the water into which the 

 sewage or effluent is discharged; of the oxygen which may be received in the water 

 by means of aeration and from higher forms of vegetalile life; and of the al)solute 

 oxygen-consuming powers of the organic matter in the water of the stream and in 

 the sediment on the bottom and sides of the stream itself. To these factors shoul<l 

 be added the effect of the very important items of temperature and the period of 

 time during which biological changes may take place." 



Farm building's, J. Dangi^y {Constructions rur ales. Paris: J. B. Batllitre d- Sons, 

 1904, pp. 442, figs. 273). 



Barn plans and outbuildings {Neiv York: Orange Judd Co., 1903, jyp. XVI -\- 388, 

 pi. l,figs. 374). — A revised and enlarged edition of this book, first issued about 20 

 years ago, in which has been incorporated plans and descriptions of modern improve- 

 ments in construction, ventilation, sanitation, etc., of farm buildings. The original 

 edition was prepared largely by B. D. Halsted, the revised edition by E. C. Powell. 



A new type of steam shovel {Engineer, and Min. Jour., 77 {1904), No. 5, p. 205, 

 fig. 1). — The construction and operation of the Kilgore direct-acting steam shovel 

 are discussed. 



Fowler's steam disk plow {Deut. Landv. Presse, SO {1903), Nos. 98, p. 844; 102, 

 J). 881, fig. 1) . — Brief notes on the construction and operation of this plow. 



An automobile cultivator, G. Caye {Nature [Paris'], 31 {1903), No. 1555, pp. 

 237, 238, figs. 2). — A revolving "digger" drawn by an automotor is described. 



Combined cultivators and seeders, M. Rixgelmann {.Tour. Agr. Prat., n. ser., 

 7 {1904), No. 2, pp. 46-51, figs. 6). — Various forms are described, with brief accoiints 

 of tests. 



Cotton gins: The saw gin, F. Main {Jour. Agr. Prat., n. ser., 6 {1903), No. 50, 

 pp. 774-776, figs. 2). — The construction and operation of this type of gin are dis- 

 cussed. A previous article (E. S. R., 15, p. 522) discussed roller gins. 



Recent progress in the field of agricultural machinery, W. Heerberger, A. 

 Nachtweu, L. Wrobel, E. Wrobel, and W. Steeger { Fid ding' s Laiidv: Ztg.,52{1903), 

 Nos. 1, p)p- 36-39, figs. 4; 2, pp. 76-78, figs. 2; 3, pp. 112-114, fig. 1; 4, PP- 190, 191, fig. 1; 

 6, pp. 223-228, figs. 6; 7, pp. 266-268, figs. 2; 8, jip. 300-303, figs. 3; 9, pp. 332-337, figs. 

 3; 10, j>p- 367-372, figs. 6; 11, j)p. 402-408, fig.':. 6; 12, pp. 483-441, figs. 9; 13, pp. 482, 

 483; 14, pp. 520-523, fig. 1; 15, pp. 554, 555, fig. 1; 16, pp. 594-596, figs. 2; 17, pp. 

 636-638, figs. 2; 18, i)p. 684-686, fiigs. 3; 19, pp. 721, 722, figs. 2; 22, pp. 837-840, figs. 



