A TREATISE ON GAS-EIGHT,

GO

shape, at an expence out of all proportion be^low the value of the products*

S KE T C H

OF

THE RISE AND PROGRESS

OF TIIE

PISCO VERY AND APPLICATION

OF

COAL-GAS,

AS A SUBSTITUTE FOR PROCURING

ARTIFICIAL LIGHT.

To assist the reader in comprehending 1 thenature and object of substituting coal-gas fortallow or oil, for the purpose of obtaininglight, it may be proper to touch slightly uponthe successive discoveries that have been madeas to the decomposition of coal, and the appli-cation of its different ingredients. Such asketch will add to the many examples that oc-cur in the history of science and art, showingthe slow progress of mankind in following upknown principles, or extracting from acknow-ledged facts every possible advantage.

In the Philosophicacal Transactions of the