Читать книгу The Mirror of Literature, Amusement, and Instruction. Volume 10, No. 284, November 24, 1827 - Various - Страница 7

Smoke of Lamps

A recent number of Gill's "Technical Repository," contains a simple mode of consuming the smoke that ascends from the turner of an argand lamp. It consists of a thin concave of copper, fixed by three wires, at about an inch above the chimney-glass of the lamp, yet capable of being taken off at pleasure. The gaseous carbonaceous matter which occasionally escapes from the top of lamps, is thus arrested beneath the concave cap, and subsequently consumed by the heat of the flame, instead of passing off into the room, in the form of smoke or smut on the ceiling and walls.

[The "Technical Repository," may have the credit of introducing this contrivance to the British public; but it is somewhat curious that it had not been previously adopted, since scores of lamps thus provided, are to be seen in the cafés and restaurateurs of Paris. Apropos, the French oil burns equal in brightness to our best gas, and as we are informed, this purity is obtained by filtration through charcoal.—ED.]

Caddis Worms

The transformation of the deserted cases of numberless minute insects into a constituent part of a solid rock, first formed at the bottom of a lake, then constituting the sides of deep valleys, and the tabular summits of lofty hills, is a phenomenon as striking as the vast reefs of coral constructed by the labours of minute polyps. We remember to have seen such caddis-worms