Modern buildings : their planning, construction and equipment (1905)
Middleton, G. A. T. (George Alexander Thomas) · London : Caxton Publishing Company, Limited · leaf 21
se readings are required they must be supplied with an extending revolving arm, with a vernier scale on it like that on is a travelling thread worked by a mill -headed a theodolite, with similar clamp and tangent screws for screw A, to give absolutely exact adjustment of accurate adjustment.… … needle on the centre, while another guides the pen or pencil. A Pricker is another important instrument, though it is nothing more than a needle with a handle to it, for use when transferring drawings from one sheet more, and many draughtsmen prefer to purchase singly of paper to another, by…
Building · Architecture
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
