 | American School of Correspondence - Civil engineering - 1908 - 474 pages
...the tracing cloth is very satisfactory and that a good drawing can be made on it quite as easily as on paper. The necessity for making erasures should...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, BO that it may readily be run in and out of a window.... | |
 | Howard Monroe Raymond - 1908 - 426 pages
...the tracing cloth is very satisfactory and that a good drawing can be made on it quite as easily as on paper. The necessity for making erasures should...of a frame similar to a picture frame, in which is sot a piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm,... | |
 | Heating - 1909 - 412 pages
...printing in which the tracing is used in a manner similar to the use made of a negative in photographv. Almost all drafting rooms have a frame for the purpose...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, so that it may readily be run in and out of a window.... | |
 | Architectural drawing - 1910 - 430 pages
...eraser. All moisture should be kept from the cloth. Blue Printing. The tracing, of course, cannot be Bent into the shop for the workmen to use, as it would...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, so that it may readily be run in and out of a window.... | |
 | Charles Lewis Griffin, Charles Clyde Adams - Machinery - 1914 - 308 pages
...is better to use a soft rubber eraser. All moisture should be kept from the cloth. Fourth Step — Blue Printing. The tracing, of course, cannot be sent...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, so that it may readily be run in and out of a window.... | |
 | Machine-shop practice - 1917 - 432 pages
...is better to use a soft rubber eraser. All moisture should be kept from the cloth. Fourth Step — Blue Printing. The tracing, of course, cannot be sent...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, so that it may readily be run in and out of a window.... | |
 | Civil engineering - 1909 - 458 pages
...such as a line crossing, it is better to use a soft rubber eraser. All moisture should be kept'from the cloth. Blue Printing, The tracing, of course,...piece of clear glass. The whole is either mounted on a track or on some sort of a swinging arm, so that it may readily be run in and out of a window.... | |
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Blue Printing. The tracing, of course, cannot be sent into the shop for the workmen to use, as it would soon become soiled and in time destroyed, so that it is necessary to have some cheap and rapid means of making copies from it. These copies are made... 
