editions:GENT900000070826

The numbers of the ten feet spaces were to be marked by drilling small holes in the tags. I intended to use this for the principal lines of my surveys and to use the chain only for lines which were not of great importance. " When I called upon Mr. Heller...

Remarks on Engineers' Surveying Instruments - Seite 42
1888
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Report on the Mining Methods and Appliances Used in the Anthracite Coal Fields

Henry Martyn Chance - 1883 - 716 Seiten

...stretched as much as possible in making, so as to do away as well as I could with that source of error, and then to have it graduated every ten feet. I proposed...measure constructed which is now before you. It is 500 feet long and weighs 2 ft. 7£ oz. It is a ribbon of tempered steel, 0.08 inch wide, 0.015 inch thick....

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