This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...it also has much greater strength. In one comparison a ditch that was being covered to the thickness of one inch had a depth of four feet and a bottom width of six feet with side slopes of one to one. Seventeen linear feet of this ditch was covered in one hour by the gun, three men being employed in ...

The New Stone Age 2016, Palala Press

ISBN-13: 9781356112227

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The New Stone Age 2016, Palala Press

ISBN-13: 9781357423285

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The New Stone Age 2009, BiblioLife, Charleston SC

ISBN-13: 9781116990003

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The New Stone Age 2009, BiblioLife, Charleston SC

ISBN-13: 9781116989991

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