Scutch 427 Shoddy and wool-waste 427 Soot 428
CHAPTER XVII.--SEWAGE AS A MANURE.
Irrigation 431 Effects of continued application of sewage 433 Intermittent irrigation 434 Crops suited for sewage 434 Treatment of sewage by precipitation, &c. 436 Value of sewage sludge 439
Manures and the Principles of Manuring · The Wunder Library — complete classics, free to read, with narration.