Purifying of Coal-Gas. 375 
A complete History of Lithography, from its Origin down to 
the present Time, by the Inventor, Alois Senefelder ; containing 
clear and explicit instructions in all its branches ; accompanied. 
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most familiar manner the whole rudiments of imitation, design, 
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veral curious and useful miscellaneous articles. By T. Hudson 
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valuable work re-appears as a second edition, with additions, in 
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Preparing for publication,—Observations on Inflammation of 
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sembling pulmonary consumption, &c. exemplified by cases, 
dissections, and coloured engravings of the morbid appearances. 
By Thomas Alcock, Surgeon. 
LXI. Intelligence and Miscellaneous Articles. 
PURIFYING OF COAL-GAS, 
Is our Jast we inserted a communication from Mr..S. Parker 
of Liverpool on this subject, and in our presentnumberis one from 
Mr. G, Lowe of Derby in reference to Mr. Parker’s. We now 
subjoin the method of purifying coal-gas, for which Mr. G, H. 
Palmer of Regent-street in the city of Westminster lately ob- 
tained a patent ; and which in principle seems to coincide with 
Mr. Parker’s ; for we conceive the effect in Mr. Parker’s pro- 
cess to be produced by the oxidation of the ignited iron tubes, 
Aad through 
