The things we do!

It's simply this: you press
downwards, but the pressure's transmitted sideways. By the way," he went
on, turning to me, "has it struck you there might be a danger of pressing
down the ends of the blade, and making a convex cut?"
"That's obviated in the first place by these rollers under the blade."
"True; that goes for something. And in the second place?"
"In the second place, it would be impossible to make a convex cut with
this apparatus even if you wanted to. The blade, you see, has a T-shaped
back; that makes it practically impossible to bend it."
I fancy the Captain put forward some of his objections against his own
conviction. Knowing all he did, he could have answered them himself better
than I. On the other hand, there were points he did not notice, but which
caused me some anxiety. A machine that was to be carried about in the
woods must not be made with delicate mechanism. I was afraid, for
instance, that the two steel guides might be easily injured, and either
broken away, or so bent that the wheels would jam.


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