Filtration of natural waters.
Fischer. Vierteljahresschrift für Gesundheitspflege, 1891, p. 82.
Discussion of papers on water-filtration.
Fränkel. Vierteljahresschrift für Gesundheitspflege, 1891, p. 38.
On filters for city water-works.
Fränkel and Piefke. Zeitschrift für Hygiene, 1891, p. 38, Leistungen der Sandfiltern.
E. Frankland. Report in regard to the London filters for 1893 in the Annual Summary of Births, Deaths, and Causes of Death in London and Other Great Towns, 1893. Published by authority of the Registrar-General.
P. Frankland. Proc. Royal Society, 1885, p. 379.
The removal of micro-organisms from water.
—— Proceedings Inst. Civil Engineers, 1886, lxxxv. p. 197.