8 Introductory Remarks. 
stupendous vessels, which combine speed with certainty, and 
establish upon the bosom of the deep the luxuries and accom- 
modations of the land. 
The successful execution of this magnificent design was first 
witnessed upon the waters of the Hudson, but is now imitated 
in almost every civilized country ; and it remains to be seen 
whether they will emulate us by transporting, by the same 
means, and against the same obstacles, the most formidable 
trains of artillery. 
The mechanical inventions of this country are numerous ; 
many of them are ingenious, and some are highly important. 
In no way cana knowledge of them be so readily and exten- 
sively diffused as in a scientific journal. To this object, there- 
fore, a part of our labours (should there be a call for it,) will be 
devoted, and every necessary aid will be given by plates and 
descriptions. 
Science and art mutually assist each other; the arts furnish 
facts and materials to science, and science illuminates the path 
of the arts. 
In a word, the whole circle of physical science is directly 
applicable to human wants, and constantly holds out a light to 
the practical arts; it thus polishes and benefits society, and 
every where demonstrates both supreme intelligence, and har- 
mony and beneficence of design in roe Creator. 
The science of mathematics, both pure and mixed, can never 
cease to-be interesting and important to man, as long as the 
relations of quantity shall exist, as long as ships shall traverse 
the ocean, as long as man shall measure the surface or heights 
of the earth on which he lives, or calculate the distances and 
examine the relations of the planets and stars ; and as long as 
the iron reignof war shall demand the discharge of projectiles, 
or - construction of — defences. 
