A NEW BLOW—PIPE..
The blow-pipe- has always been attended with the inconvenience of exhausting one's breath, in order to perform certain work. Nothing could be more objectionable. Messrs. Lewis and Pain, of Bloomsbury, have, however, by-the aid: of vulcanized, india-rubber„ overcome it is said,. the objection: indicated,. They make a small pair of bellows, the sides of which are of india-rubber, and without a nozzle,, but having a hole instead, into. which. is screwed a tube of the same flexible material. This tube is attached to the blow-pipe. Between the bellows and the blow-pipe, and attached to the tube, is an air-chamber, into which the air is pumped by the bellows, the bellows being pieced on the fboor and worked by the foot in the same manner as a treadle. The air when forced into-the chamber caw be readily operated on by the manipulator, ' so as to cause a greater or lesser stream of air to be forced upon the object tio be operated upon.
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