ERRATA. 



On page 894, from bottom 12th line, read " facilities" for "faculties." 

 " " " J 6th line, read "forces" for "forms." 



897, " " 18th line, read "struts" for "streets." 



" " " 17th line, read "riveted" for "melted." 



900, " " 8th line, read "span" for "space." 



901, " " 15thline, read "trussed" for "tressled." 



902, " " 15th line, read "funicular" for "furncular." 

 903," " llthline, read"8"for "4i and5|." 



" " " " " strike out "respectively." 



904, " " 10th and 19th lines, read "struts" for "streets." 



905, top line, read "trussing" for "trussary." 

 " from top, 16th line, read "roadway" for "t&Hwslj." 

 " " " 17th line, read "suitable bracing" for "suitable strut." 



