345 
Steam Engine. 
being extremely ingenious, we think we shall be gratb 
fying our readers by laying a description of it before 
them, which we shall in our next, with an accurate en- 
graving.* 
The two boilers now constructing for Messrs. Meux 
will not be the least curious part of the immense collec- 
tion of ingenious mechanism of which their premises can 
boast They are not intended for the steam engine, but 
to supercede the necessity of applying fire directly to then 
two large boilers, each of which are of the contents of 
about 800 barrels. They are in future to be heated by 
steam, sent into them from these new boilers ; which 
will not only prevent the wear to which the coppers are 
exposed by the usual practice, which costs a large sum 
of money yearly, but, it is expected, will produce a large 
saving in fuel. 
We understand also, that when these boilers are finish- 
ed Messrs. Meux mean to have one constructed for their 
steam engine. Indeed, if these boilers sliall be found to 
answer the purposes expected from them, and we can see- 
no reason to induce us to doubt of their success, it will 
occasion a complete change in numerous departments of 
arts and manufactures, in which steam and the heat that 
may be obtained from it are, or may be, advantageously 
employed.! 
Description of Mr. Arthur Woolf improved Piston for 
Steam-Engines. 
THE common method of packing the piston of a 
steam engine is so well known, that a very particular 
description of it in this place is not necessary. Suffice 
it to say, that the hollow part round the piston, is filled 
^ Already given in this number. 
t Mr. Woolf has adopted for the door of his furnace Mr* Ro* 
bertsoms invention for consuming smok^. See beginning of this 
