. Lighthouse construction and illumination; . l so recently as 1868, when Captain Dotysolved the problem and brought out his mineral oil 125 is a section and plan of a four-wick Doty a happy choice of proportions in the various parts ofhis burner, and by the addition of an exterior cylinder sur-rounding the outer wick, and a central disc, both placedin such a manner as to throw a current of air into the SOURCES OF ILLUMINATION. 207 flame at the right place,Doty succeeded in pro-ducing single and multiplewick hydro-carbon burn-ers, which carry a flame ofgreat luminous inte
. Lighthouse construction and illumination; . l so recently as 1868, when Captain Dotysolved the problem and brought out his mineral oil 125 is a section and plan of a four-wick Doty a happy choice of proportions in the various parts ofhis burner, and by the addition of an exterior cylinder sur-rounding the outer wick, and a central disc, both placedin such a manner as to throw a current of air into the SOURCES OF ILLUMINATION. 207 flame at the right place,Doty succeeded in pro-ducing single and multiplewick hydro-carbon burn-ers, which carry a flame ofgreat luminous intensityand regularity. The over-flow of oil required to keepthe colza burners cool isunnecessary in these, andtherefore the oil is main-tained at constant level,tills being effected in theordinary mechanical andmoderator lamps by aningenious stand pipe, de-vised by Doty, and repre-sented in Fig. 125. Thefollowing table gives thedetails of these burners,and also the candle power Fig. 125. and consumption, as determined by Dr. Stevenson Macadam-.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1881
