[ 3 ,] 
fights are thus thrown on the rationale of manufacturing 
processes, which will enable a practical man better to 
understand the nature and effect of the processes he has 
been accustomed to use, and to correct and vary them 
without depending upon chance whether lie be wrong or 
right. 
Moreover, there is hardly a manufacture that is not 
capable, in some way or other, of improving and throwing 
light upon some other manufacture, in appearance widely 
different. The art of the watchmaker has very greatly con- 
tributed to the perfection of the cotton machines. Scheele’s 
discovery of the oxy- muriatic acid, has added one fourth to 
the capital of all the bleachers and callico-prmters of 
Great Britain ; the theory of Lavoisier gave rise to D’Ar- 
gand’s lamp ; the experiments on the distillation of' pit 
coal for coal tar, promise fair to furnish a better, a bright- 
er, a safer, a cheaper light, than any other known com- 
bustible; the barometer has greatly improved the steam 
engine, and the water blast of the British iron works ; the 
application of steam has, in England, changed the face of 
the dye house, the distillery, and the soap manufactory ; 
it has improved the cooking apparatus of the kitchen, it 
has warmed the public buildings, it has been converted 
into a medicinal application of great importance, — -while 
the steam engine itself has given incalculable force and 
facility to the manufactures of the kingdom, nearly with- 
out exception. 
In almost all this knowledge, and in this application 
of it, as in a thousand similar instances that might be 
added to this short list, our own country is yet behind- 
hand, and has yet to learn. 
Moreover, papers that would be considered as of no 
great moment in that manufacturing country, will be of 
use in this. In the infancy of our manufacturing esta- 
blishments, the conductors of them have to fed their path, 
