. Lighthouse construction and illumination; . Plate :?vXXlll GRAPHIC TABLE FOR THE SOLUTION OF THE EQUATION OF RANGES Ziii/nuiousJntensitz/ l?yi/?-^e i^/^ f^e f//?/^ /z^/i/ fn A/^^^fe^r^.i- /h/^- ^ = C>/ 3ez /7a £6 2 3/ e s ee 3 /6 ? / 7a / oo Coe/ytccent, Sitrcuispaj/>nci/

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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1881