116 Description of Mr. Perkins’ New Steam Engine. 
The engine which we have now described, is at’ Bree 
performing actual work in Mr. Perkins? manafacto ee 
is calculated as equal to a ten-horse power, though the cyl- 
indéer is no more than two inches in diameter, and eight- 
een inc long, with a stroke of pay twelve inch- 
es. Although the space pile by the engine is’ not 
greater than 6 feet by 8, yet Mr. Perkins considers that the 
apparatus (with the exception of the working cylinder 9 
and piston PQ.) is perfectly sufficient fora “30-horse’ en- 
gine. When the engine performs full waite ‘it consiimes 
only two boshels of coal in the day. 
On the application of Mr. Perkins? rene to serra 
gines of the old construction. 
Great as the invention is which we have now described, 
yet we are disposed to think that the application of the prin- 
ciple to old steam-engines is not less important.* When we 
consider the enormous capital which is at present embod- 
ied in Great Britain in the substantial form of steam en- 
se noble machines impel and regulate the vast popula-— 
tion of wheels and pinions over which they reign, we feel 
as if some vast innovation were proposed upon our estab- 
lished usages, by the introduction of N Mr. Perkins’ engine. 
The very idea that these potentates of the TRAE RAN? 
worid should be displaced from their thrones; that thei 
strong holds should be dismantled ; their palaces demolish 
ed, and their whole affairs placed under a more economi- 
cal management, is somewhat startling to rian who dread 
change, and admire institutions that both work and wear 
well. Mr. ins, however, has saved them from such a 
degradation. Ble Tas allowed thei to retain all their hon- 
ors and privileges, and ——— only to invigorate them 
with fresh influence and er. 
In this new system, the old engines, with their cue are 
retained unaltered. The furnaces alone are removed. Mr. 
Perkins constructs a generator consisting of three horizon- 
tal tubes of gun-metal, connected together, filled with wa- 
*This invention appears to have been fully established by direct experi- 
Et eT ne nem encine, with with all its ts great promis, sail only wader 
