Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 410
in which the lower carbon is madepositive. The effect of this combination is best shown in Fig. 41).Fig. 50 shows the change in the illumination curve produced bysuch shading. Inverted arcs have a considerable apj)lication whenthe light may be readily reflected and diffused as in lighting… … Fig. 49. The use of opal enclosing globes is recommended for arc lampsused for street lighting for the reason that they change the dis-tribution of the light so that it covers a greater area, and the lightis so diffused as to obliterate shadows in the vicinity of the lamp.Table 11 gives the…
Architecture · Building · Carpentry
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