942 Foreign Literature and Scrence. 
pipes, into the apartment required, and afforded at a very 
moderate price. 
M. Gonord, of Paris, has discovered the art of enlarging 
or diminishing the scale or size of an engraving on copper, 
without changing the plate ; in other words, if an engraved 
plate of copper be given to him, he can make use of it in 
such a manner as to obtain impressions of any size he pleas- 
es, either greater or less than those of the plate. From 
the plates of a folio atlas, for example, he can produce an 
atlas in octavo, and without changing the plates. He is 
able, also, by the methods he adopts, to make impressions 
upon various materials, as paper, metal, porcelain, marble, 
&e. An. de Chimie, Jan. 1820. 
Steam Navigation is now making a rapid progress in 
Great Britain. ‘There are on the river Clyde, twenty-five 
steam boats, the largest of which has a burden of ninety-one 
tons, and the least of thirty-five. Twelve of these boats 
pass between Glasgow and Greenock. There are four steam 
boats on the Frith of Forth, which are said to carry during 
the summer five hundred passengers daily. 
Steam boats also ply on the Fay, the Humber, the 
Trent, the Thames, the Dee and the Mersey. Passengers 
are now conveyed by steam from Liverpool to Belfast and 
Glasgow, and from Dublin to Holyhead. 
The Scotch are very locomotive. The number of pas- 
sengers who were conveyed along the Forth and Clyde 
canal, between Glasgow and Edinburgh, amounted in 1818 
to ninety-four thousand two hundred and fifty ; between 
Glasgow and Paisley on the Ardrossan canal, fifty-one thou- 
sand seven hundred; and from Glasgow along the Monk- 
land canal, eighteen thousand. 
It is calculated that a person has fifteen hundred opportu- 
nities of leaving London in the course of twenty-four hours - 
by stage coaches, including the repeated trips of the coaches 
which run short distances. It is understood that three hun- 
dred stage coaches pass through Hydg Park corner daily. 
It appears by a note in the 16th number of the Journal of 
the Royal! Institution of Loadon, that the pyrolignous acid 
