348 
M. Lallemand's process has not yet been practically 
carried out in this country. The specimen of peat paper on 
the table, to which I am indebted to the kindness of M. 
Buisson Dumouriez, contains 75 per cent, of peat and 25 
per cent, of rags ; it resists water better than ordinary brown 
paper of a thicker texture. It was manufactured at Turin. 
About three weeks previously to the date of M. Lalle- 
mand's patent, Mr. W. H. Clarke obtained a patent for 
manufacturing a substitute for papier mache and Carton 
Pierre from peat. By his process, the previously cleaned 
peat is reduced to a pulp, by soaking it for two days in a 
solution of about six parts by weight of potash, and six of 
fresh slaked lime in one hundred parts of water. The 
peat is then submitted to the action of a weak solution of 
hydrochloric acid to remove all traces of the alkali, after 
which it is reduced by mechanical means to a state of pulp 
adapted for making paper, pasteboard, millboard, papier 
mache trays, panels, &c. &c. 
APPLICATION OF PEAT TO THE PURIFICATION OF COAL 
GAS. 
Most specimens of peat contain a certain amount of iron ; 
and there are some which contain this metal in very large 
quantities. These ferruginous peats Mr. Chisholm applies 
to the purification of coal gas, experience having demon- 
strated that peroxide of iron is the most powerful purifier 
that has yet been discovered. 
Mr. Lewis Thompson, than whom there is not a higher 
authority on such a subject, states as follows : — 
" I have practically used and investigated the process for 
purifying coal gas with ferruginous peat, lately patented by 
Mr. Chisholm, and from an experience of several months, 
can safely testify to its entire efficacy and simplicity of 
application. Where dry lime purifiers already exist, no addi- 
