miles was transplanted into Great Salt Lake. Placed end to end these piles would make a great tree that, fallen, would reach from Chicago to Buffalo. And once, for five days, one after an­other, the piles were driven so fast that the trestle grew at the rate of 1,140 feet per day. On November 13,1903, the track from the east and the track from the west were joined in the center of the lake. The great bridge across the lake is now a solid path, except for twelve miles. If no one told you otherwise, you would not know these twelve miles were on a trestle. Every fifteen feet five piles are driven in a row crosswise to the track. They are fastened together on their sides with heavy timbers, eight inches by eight inches thick. Across their tops and joining them together is a heavy beam eighteen feet long and a foot square. 26 Connecting this beam with the next set of piles fifteen feet away are twelve heavy timbers (stringers) laid length­wise with the track. Above these stringers is a plank floor three inches thick. Above that is a coat of asphalt, then a foot or more of rock ballast in which the track and rails are laid. The floor of the trestle is sixteen feet wide, and the lumber above the piling would make a board-walk four feet wide and an inch thick from Boston to Buffalo. The cut-off from Lucin to Ogden is more nearly level than an ordinary floor. For thirty-six miles there is no grade. For thirty miles more the grade is so slight that an average person would need to travel a half mile to rise his own height. Nowhere is the grade over five inches to the hundred feet. Just now the track is above the water thirteen feet. The solid way has cut off one north arm of the lake into which Bear River flows. This has made that 27