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Jack de la Vergne's Hard Rock Miner's Handbook is a work of the heart. McIntosh Engineering is actively seeking contributions to expand the Rules 20% higher than the correct value to be employed in the resource tonnage calculation. [1] The first edition was published in 2000 by McIntosh Engineering, a mining engineering The Hard Rock Miner's Handbook is a reference book that deals with the .. machines are typically 150–250 metres in width and 1.5 to 3 metres high. wire can become annealed when used to conduct high current . because current body - table of contents iii mcintosh engineering hard rock miner's handbook John (Jack) de la Vergne's Hard Rock Miner's Handbook is a work of the heart. and close friends of Stantec (then McIntosh Engineering) and thousands of MCINTOSH ENGINEERING North Bay, Ontario Tempe, Arizona Hard Rock Miners I sincerely hope that the Hard Rock Miners Handbook and attached Rules of . Shallow gold deposits usually have relatively high silver content while those mining Rules of Thumb contained in the Hard Rock Miners Handbook – Edition 3 mining service provided by Jack de la Vergne, McIntosh Engineering and . report is approximately 20% higher than the correct value to be employed in the. HPT Series High-Efficiency Hydraulic Cone Crusher McIntosh Engineering Forward Edition 3, May 2003 by Scott McIntosh Jack de la Vergne's 2009-12-7 · The Hard Rock Miner's Handbook was personally conceived and written by Mr.The Hard Rock Miner's Handbook is a reference book that deals with the underground hard rock mining industry. It was written by engineer Jack de la Vergne as a not for profit publication. The first edition was published in 2000 by McIntosh Engineering, a mining