206 Artificial Mahogany. 
with a general outline of the plan of each publication, and 
With an exposition of those parts which are remarkable for 
originality or importance. Perhaps the journal would be 
more interesting, if, in some instances, more detailed analy- 
publications: for so numerous are the monthly journals 
candour. Besides the general direction of the Baron de 
be secured by the continued zeal of its conductors, distin- 
guished no less for perseverance than talent. 
57. Mr. Perkins’s Steam-Engine.—The great power of 
Mr. Perkius’s engine he bas recently illustrated by some 
“singular experiments. He bas constructed a smal! appara- 
tus, which, when connected with the generator, has been 
found to discharge ordinary musket-bullets at the rate of two 
hundred and forty in the minute, and with such tremendous 
force, that after passing through an inch deal, the ball, in 
striking against an iron target, became flattened on one side 
and squeezed out.—Edinb. Phil. Journ. Vol. X. 
58. Artificial mahogany.—The following method of giving 
any species of wood of a close grain, the appearance of ma- 
hogany, in texture, density, and polish, is said to be prac- 
tised in France with such success, that the best judges are 
incapable of distinguishing between the imitation and maho- 
gany. The surtace is first planed smooth, and the wood is 
then rubbed with a solution of nitrous acid. One ounce 
