File:The illustrated London news (1861) (14594090187).jpg

Identifier: illustratedlondov39lond (find matches)
Title: The illustrated London news
Year: 1842 (1840s)
Authors:
Subjects:
Publisher: London : William Little
Contributing Library: Allen County Public Library Genealogy Center
Digitizing Sponsor: Internet Archive

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the i by the use of a theodolite, a small pinhole being drilled into the spot exactly. It is obvious, however, that something more would ly finding tr- ™**;1 * ~♦« nt +h~ --g up tne column it w< circles were struck in the atone from the given centre, anfive parts of these circumferences a hole was drilled, to ias guides in lowering the column into its foundations.the case of the square columns, squares were laid out in:of circles, and the lines marked in the same manner. In lc any one of these circles or squares, the girders would not fit intomoved about with very great fa-Li » l lieu hoist, worked by a portable engine of 10-horse power. The ropes, which were laid--—- j=—*ion on the ground, and which passed through blocks andcoiled on a grooved conical drum, set in motion by the- large-toothed wheels, working ir1 , .-..j i(0 the I the squares or circles 1•r as secured. A devi ; whole building, asumns. The heavy j required height in two or t <»£Z ggftc-li^^ifiiit^Pi
Text Appearing After Image:
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