ON THE WATERS OF GREEN BAY. 473 
water, with machinery well constructed; and if by breakage, ice, or other hin- 
drances, they are not compelled to lose more than half the year,—which I have no 
reason to suspect they do,—should come fully up to an vase of four thousand feet 
per day. 
The manager of one of the steam-mills, having a “‘ Muly” saw, thought he could 
turn out, with clear logs of good size, 12,000 feet to a saw in twenty-four hours. 
There are water-mills in Maine that average more than six thousand. Although 
a part of my estimate is open to conjecture, I think it does not vary materially 
from the truth, and that an increase of one-third may be expected for the year 
1850, raising it to 45,000,000 feet. 
At the mills at the Falls of the Oconto River, I saw a very ingenious mode of pass- 
ing lumber by a rapid, of half a mile in length and about sixty feet fall. It was a 
wooden canal or trough, constructed by Mr. Ingham, about four feet wide and one 
foot deep, into which the water from the tail of the mill flowed. The lumber was 
passed into this race by pieces, or boards, gliding swiftly and safely through its whole 
length into the still water below. Even a canoe freighted with ladies has been 
known to descend the chute by this mode of navigation. 
