elapses before the mantle glows with maxi- mum brightness. When mounted on a walking stick and held at the In the very large street lamps, which rival the elec- full extended length of the arm, its greatest efficiency tric arc. in intensity, the upward flow of liquid to re- is obtained, since the… … through the "unilens," eight stars can be discerned In point of economy the lusol lamp appears to sur- A Convenient Method of Viewing Objects at a quite easily, whereas with the naked eye only six can pass all other known lighting apparatus. A Denayrouze Distance. lamp having the power of 10 Carcel…
Machine · Battleship · Center · Lusol · Patents · Scientific American · Railway · Sewing machine · Rapid transit · East river · American december · Patent office · William henry · Lusol lamp · Liquid air · Sixth avenue
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![An illustration from XIXe [i.e. Dix-neuvième] siècle (en France); classes - moeurs - usages - costumes - inventions. Ouvrage illustré d'un front. chromotypographique, de 16 planches coloriées aux patrons, de 36 entetes et lettres ornées et de 487 gravures (dont 24 tirées hors texte) d'après les principaux artistes du siècle (1893)](https://img.insideoutlibrary.com/img/200/ia-xixeiedixneuvi00granuoft-820-624.webp)
