SCHUYLKILL PERMANENT BRIDGE. 77 



These objects have been long desh'ed, by astrono- 

 mical and philosophical characters. Their advantages 

 are obviously great, and highly creditable to the Com- 

 pany ; who have thus extended the public utility of this 

 establishment. 



With copies of these inscriptions, taken from the 

 Tablets, and' the list of tolls established by law, this ac- 

 count will close. The statements and remarks ha^•e 

 been made \^ ith no other views, than to excite others to 

 constancy in necessary undertakings, under circum- 

 stances appearing never so difficult and forbidding. 

 If scientific or practical knovv^ledge be wanting; it is 

 proved, that persistance, with even common talents, can 

 effect the most valuable purposes. Nor is it intended 

 to hold up this work, as one singularly pre-eminent over 

 all others ; or vainly to display peculiar personal merit ; 

 though in some of its parts it was attended with unex- 

 ampled difficulties; v/nich were overcome by unre- 

 mitted exertions. If this communication should con- 

 vey any useful instructions, pr excite to similar perse- 

 verance, its end will be attained. If it should invite 

 others, to give publicity to their ideas on such subjects; 

 and to impart similar information, of the improvements 

 made in various parts of this prosperous country; — 

 rich in the spirit, industry and enterprize of its citi- 

 zens, — no small reward will be obtained, for the time 

 and pains bestowed. 



