Sepia coloured heavy paper, plans drawn in black pen. Written on top of plan: Youngman Harrison's Patent, 22 March 1875' Plans contain drawings labelled as copper pages, roller, grating, drag. Plan has been tightly rolled. On outer edge, written in black pen Harrison Quartz Tailings Pulveriser (last word unclear)equipment, quartz tailing pulverisor, gold mining, lansell

Blue handwritten one page document detailing 'Youngman & Harrisons Patent Basin for pulverizing quartz tailings and amalgamating fine gold with mercury'. Introductory comments the basin contains greater advantages for pulverizing quartz tailings & amalgamating than any yet constructed for that purpose; In its construction all machinery complications have been carefully avoided and yet it embodies all the best methods known for treating tailings and has besides other than advantages (both in cash and labour) that of treating puddling machine sludge and can be used as a concentrator with little or no extra expense.bendigo, mining, youngman & harrisons patent basin