178. University of California, Bulletin 251, 1915.

179. Reference 25.

180. See Report by Black & Phelps of Metropolitan Sewerage Commission, 1911, reprinted as Vol. VII of Contributions from the Sanitary Research Laboratory of the Massachusetts Institute of Technology.

181. See Reports, Mass. State Board of Health.

182. Reference 47.

183. Reference 10.

184. Reference 10.

185. Reference 10.

186. Hatton, reference 33.

187. Reference 18.

188. Reference 1, at end of this chapter.

189. Reference 2.

190. Reference 6.

191. Reference 5.

192. Reference 6.

193. Reference 6.

194. Reference 8.

195. Reference 20.

196. Reference 17.

197. Reference 19.

198. Reference 21.

199. Reference 24.

200. Inorganic Chemistry, by Alexander Smith.

201. American Public Health Association definition.

202. Sewage Sludge by Allen.

203. Sewage Disposal by Kinnicutt, Winslow and Pratt.

204. Sewage Disposal by Fuller.

205. Sewage Sludge by Allen.

206. From Eng. News-Record, Vol. 84, 1920, p. 995.

207. A Simple Mechanical Control for Dosing Sewage Beds, by P. Thompson, Eng. News-Record, Vol. 84, 1920, p. 1018.

208. Sewage Disposal by Kinnicutt, Winslow and Pratt.

209. Design of Siphon by G. H. Bayles, Eng. News-Record, Vol. 84, 1920, p. 974.

TRANSCRIBER’S NOTES
  1. Silently corrected typographical errors and variations in spelling.
  2. Archaic, non-standard, and uncertain spellings retained as printed.