San Francisco : Architect and Engineer, Inc · leaf 195
y protecting the source of light and also insome instances as a lens for projecting or con-trolling light rays. For centuries this consti-tuted almost its sole use in buildings. It hasbeen only in comparatively recent years thatother uses have been found. .rJHHHBBB^HM ■■■■■■■■ « ^H ^^^^Hh ji ifHI… … EXTERIOR VIEW OF CLUB BUILDING, SHOWING USE OFGLASS BLOCKS FOR STAIRHALL ILLUMINATION We now find it used as an insulator for tele-phone, telegraph and power lines; and as aninsulation material in building constructionused to assist in controlling temperature andhumidity; as a thermal insulator; as…
Architecture · Building
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