cutting edges, b b, and other- ception, let into the frame before mentioned. The the lucky purchaser of his patent, and besides he in- wise explains itself. The whole affair is quite tasty body of the valve is of wood, confined in a frame of forms us he is to receive a handsome tariff on every and… … mean panatechner. cleats, C, which form the HEATH'S PATENT VALVE FOR CANAL LOCKS. valve seat; the relations of the cleats and edges of the valve being so an- THE POLYTECHNIC ASSOCIATION. not pay ? Patents on small articles for which there alogous that they have similar letter of refer- is a great…
