Harris, J. H. Hints on cyanidation : the use of charcoal in precipitation / J. H. Harris. - Dar es Salaam : Government Printer, 1940. - 13 p. ; 25 cm. - Tanganyika Territory.Department of Lands and Mines. Geological Divis ion ; Pamphlet No.8 . Subjects--Topical Terms: Precipitation (chemistry).--------Charcoal.-------- Gov. Doc. Class. No.: G EAT C621 (08) 4/8