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The feeding screws, will by much using the Instrument work out of it's place & cease to move the wood towards the cutter: this is rectifyed by turning the Handle lite the point of the cutter rests exactly over the aperture in which the wood is fitted, then by turning the small key with the milled head (or bottom of the instrument) to the left, the screw will again be brought towards the bottom, & be fitt to perform it's office for several hundred slices:

After the above operation, it always becomes necessary to put a longer piece of ivory under the wood to bring it within reach of the cutter.