The things we do!

Aha, now, what have you got to say?
Here's the problem solved! I had bought a huge saw-blade and cut teeth all
down the back; these teeth fitted into a little cogwheel set to take the
friction, and driven forward by the spring. The spring itself I had
fashioned originally from a broad staybusk Emma had given me, but, when I
came to test it; it proved too weak; so I made another from a saw-blade
only six millimetres across, after I had first filed off the teeth. This
new spring, however, was too strong; I had to manage as best I could by
winding it only half-way up, and then, when it ran down, half-way up
again.
I knew too little theory, worse luck; it was a case of feeling my way at
every step, and this made it a slow proceeding. The conical gear, for
instance, I found too heavy when I came to put it into practice, and had
to devise a different system altogether.
It was on a Sunday that I fixed my apparatus to the stump; the new white
woodwork and the shining saw-blade glittered in the sun.


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