from whence it can readily be removed. Fig. 64 shows the working parts of the machine. E is a lever which works the bellows, resulting in a continuous indraught, or suction of air; at the nozzle

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A. When the machine is in use a flexible tube is fitted into the socket at A, and a cleaner or brush is fitted at the opposite end of the tube. The cleaners are of various shapes, depending upon the