34 A STATISTICAL ACCOUNT OF THE 



would it be SO well calculated for heavy transportation. — 

 More important than all — it would be unfit for covering 

 to such advantage. Notwithstanding this great im- 

 provement, was highly approved by Mr. Palme?' it was 

 not in his contemplation, as to rnode^ until the outline of 

 the present cover was shewn to him ; although he said he 

 had repeatedly, but fruitlessly, urged the measure of co- 

 vering their bridges, in A^ezv England. It is hoped this 

 example will be followed, in all pontifical wooden struc- 

 tures of magnitude, hereafter. Bridges may, for most 

 situations, be less expensive in the frame ; the middle 

 section may be omxitted above the flooring ; nor need 

 they be more than 30 feet wide. This width was deem- 

 ed sufficient by Mr. TFeston^ for bridges in general; 

 though he considered that over the Schuylkill to require 

 more than comm.on space, for its constant and burthen- 

 some transportation. The Easton bridge, built under 

 Mr. Pfli/wer'^ directions, is 28 feet wide; and the frame 

 of the middle section does not rise above the platform. 

 Its situation does not demand a plan, or call for dimen- 

 sions, on a greater scale ; and it is erected according to 

 the improved work of the frame of the Sc/mi/lki II bridge. 

 Although the cover of the Schuijlkillhridge compelled 

 ornament, and some elegance of design, lest it should 

 disgrace the environs of a great City ; these would not 

 be necessary in such a degree, in other situations. 

 Neatness of elevation and taste in design, may be shewn 

 at a small expence ; and the \'7orkm.anship and materials 

 need be no more costly, than tliose for roofing and wea- 

 ther boarding common frame buildings. The Schuyl- 

 kill bridge roof required one hundred and ten thousand 

 shingles, of 3 feet long and 6 inches wide; and other 



