A Practical Treatise on Gas-light / Exhibiting a Summary Description of the Apparatus and Machinery Best Calculated for Illuminating Streets, Houses, and Manufactories, with Carburetted Hydrogen, or Coal-Gas, with Remarks on the Utility, Safety, and General Nature of this new Branch of Civil Economy.

by Friedrich Christian Accum

[Fig. 9]. A stop-cock with ball and socket, which, when adapted to a gas-light pipe, allows it to have an universal motion, so that the light may be turned in any direction.

[Fig. 10]. Section of the stop-cock, with ball and socket.

[Fig. 11]. Shows the ball and socket, [fig. 9], in perspective.

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[Plate IV],[26] [fig. 1]. A Candelabrum; the gas pipe ascending from the floor of the apartment, through the column a, and terminating in the burner of the lamp.

[26] The gas-lamps exhibited in this plate, are employed in the library, counting-house, warehouse, and offices of Mr. Ackerman, and, by whose permission, they are copied on this occasion.

[Fig. 2]. A fancy pendent Cockspur Lamp. The gas being transmitted to the burners, c c, by means of the pipe, a.

[Fig. 3]. A Pedestal Argand Lamp. a, the pipe and stop-cock, which transmits to, and shuts off the gas from the burner of the lamp.