. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 388 REPORT OK NATIONAL MUSEUM, 1!)03. in the l^ostoM iimsoinn incntioiicd, unless it eseaped my notice, while scarce!}^ a building- for collections exists which is not capable of improv^ement in this respect. The company makes (JO different kinds of pi'isniatic panes and single prisms, the latter for skylights, wdiich in the United States arc used very nuich in rooms under the pavements of the streets, since these rooms belong to the cellar
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 388 REPORT OK NATIONAL MUSEUM, 1!)03. in the l^ostoM iimsoinn incntioiicd, unless it eseaped my notice, while scarce!}^ a building- for collections exists which is not capable of improv^ement in this respect. The company makes (JO different kinds of pi'isniatic panes and single prisms, the latter for skylights, wdiich in the United States arc used very nuich in rooms under the pavements of the streets, since these rooms belong to the cellars of the adjacent houses. The ribbed panes, of the uniform size of 10 square centi- meters, are electrol^^ticall}^ glazed between liat copper bands," and are then fireproof, which offers another great advantage and permits their employment as window shutters, doors, etc., for closing- entire stories, and the like. A similar company is the Mississippi Glass Company, with agencies in Boston (Boston Plate and AVindow (llass Company). Prof. C. IT. Norton, of the Massachusetts Institute of Technology, made a report on this subject in 1898. based upon experiments (The Diffusion of. js.—TriMnatic, ribbed-glass unit of the American Luxfer Prism Company. -Single prism, as made by the Americau Luxfer Prism Company. Light through Windows, in the seventy-second circular of the Boston Manufacturers' Mutual Fire Insurance Company, b}^ E. Atkinson, 18 pages in quarto).'' O. K. Basquin })ublished in lSi>9 for the German Luxfer Prism Syndicate in Berlin a Handbook on Luxfer Prisms and Electro-glass (82 pages, quarto, wath 21 plates and al)out 100 text figures), which offers an explanation of this subject, which is so important for lighting and such a security against fire.'^^ I give :i « There are now (1903) manufactured large panes of prisniatically ribl)e(l with- out the.«e copper bands between, which, though not as powerful as those small ones, give very good results
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
