Engineering and Contracting . steam Pipe Floor Plate Ink Bottle Holder. shade in the usual manner. To cover the drawing tiltup the hinged strip and pull down the shade. Oilclothmay be substituted for the ordinary window shade clothand in place of the bottom stick a ^i-in. iron rod can beused; these are improvements over the standard windowshade. Weighing approximate method of determining the areas ofirregularly shaped surfaces is to plot the surface ondrawing paper, cut away all the paper outside the plattedsurface, weigh the paper included in the plat and divideby the weight of a kno
Engineering and Contracting . steam Pipe Floor Plate Ink Bottle Holder. shade in the usual manner. To cover the drawing tiltup the hinged strip and pull down the shade. Oilclothmay be substituted for the ordinary window shade clothand in place of the bottom stick a ^i-in. iron rod can beused; these are improvements over the standard windowshade. Weighing approximate method of determining the areas ofirregularly shaped surfaces is to plot the surface ondrawing paper, cut away all the paper outside the plattedsurface, weigh the paper included in the plat and divideby the weight of a known unit area of the same Drying-Case for Blueprints. This method has been actually used with satisfaction formeasuring land areas. Blueprint Drier for Indoor or Outdoor Use. The case made of wooden strips fitted with panels ofwire mesh, shown in the illustration, may be used oneither the outer or inner sill of a window for the dryingof blueprints. In warm weather it may be used in theposition indicated, the prints being placed on the screenedsurface of the bottom. A free circulation of air isafforded and the prints dry quickly. When weather con-ditions do not permit its use outdoors, the drier may beset on the inner window sill over a radiator. Snap hooks A u g u s t 3 0, 1 9 1 6Vol. X L \ 1. No. 9 with appropriate attachments on the window frame onboth the inner and outer side, must be provided.—JohnHavekost in Popular Mechanics. Substituting Revised Details by Photographs. Sometimes duplication work can be shortened by thehid of photography. For instance, some time ago it wasmade standard practice on a la
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
