418 
Scientific Intellig ence. — Arts. 
condensation by cold. This sudden expansion of the steam 
produced from the union of the two gases, expels from the cylin- 
der a great proportion of the gaseous fluids, incapable of con- 
densation ; and, in fact, operates so much like the steam in a 
common engine, that Brown’s discovery may still with propriety 
be called a steam-engine,-— with this difference, that the elastic 
and condensible fluid is generated at a high temperature, from 
materials admitted into the cylinder itself. The extent of power, 
or the vacuum produced, must depend upon the temperature at 
which the combustion takes place ; a slow combustion producing 
steam of a low degree of elasticity, while a rapid union of the 
gases will highly expand the steam, and effect an extent of va- 
cuum when condensed, corresponding to the degree of its pre- 
vious expansion. — Edinburgh Times. 
SO. Loco-motion steam-carriage. — We understand, that two 
engineers of this neighbourhood, (Messrs Buntals and Wilt,) 
have recently taken out a patent for a loco-motive or steam-car- 
riage, considered by the patentees to be adapted as well to com- 
mon roads as railways. The whole weight of a coach, with ma- 
chinery, water and coal, will not be above a ton heavier than 
the present stage-coaches, while the power may be readily va- 
ried from two to ten horses, according to the inequality of the 
road. The speed at present contemplated, is twelve miles per 
hour ; and if the inventors, (who are represented to us as inge- 
nious and experienced practical engineers), have not, like many 
other projectors of the present day, deceived themselves, our 
next number may have to record an important application of 
steam power. -- 
Art. XXIX. — List of Patents granted in Scotland from 9>d 
December 1824 to 1th March 1825. 
70. To Robert Bowman of Aberdeen, Scotland, chain-cable- 
maker, for an improved apparatus for stopping, releasing, and 
regulating chain and other cables of vessels, which he denomi- 
nates Elastic Stoppers.” Sealed at Edinburgh 16th December 
1824. 
