CARBONIC OXIDE. A gas corn pcsed of made,—wire, covered with tin, is then wound tight and spirally all over the con vex surface of the cylinder. Metal pro per for soldering is then poured over the surface thus formed, which renders the whole firm and compact, the surface is then turned true, and the cylinder is ready to receive the teeth of such charac ter as may be desired.
In the same yearpatents were granted for a new method of constr acting burring cylinders. A proper cylinder is first con structed for the reception of the teeth, wire of proper size is then rolled flat, and afterwards planed in such a manner as to leave a rib or shoulder its whole length on the one side, and a thin edge on the other. Notches are then filed into the thin edge at intervals, thus forming teeth. The convex surface of the cylinder is then grooved at proper intervals around its surface, and the toothed strips on the edge having the shoulder, are laid into the groove, and the ridges of metal be tween the grooves are forced down upon the shoulders to hold them in place ; or the toothed strips are wound upon the cylinder and soldered, and the cylinder is finished, the shoulders, &c., giving pro per distance between the rows of teeth. A patent was also granted for a carding machine, in which a cylinder, like Park hurst's burring cylinder, is made to work against the main cylinder. When cards
are used the teeth will yield, and a knot, closely matted together, might be carried through the machine without being pro perly opened ; but the cylinder above mentioned would hold such a knot, and bring it successively in contact with the teeth of the main cylinder, until by de gi-isa it would be opened and carried for ward.
Another patent has been granted for improvements in this variety of machines, which consists principally in banding Dorn the main cylinder, and thus giving a high speed to the workers with little increase of power.
Messrs. J. Lambert and J. Zimmerman, of Waterloo, New York, have made an improvement in the working of carding machines, for which they have taken mea sures for a patent, and which is said to card double the quantity at least, in the same time, that has usually been done by the old mode of operation. The "workers," instead of carrying round the wool from the main cylinder, at once, by revolving in a contrary direction, re volve with it, and carry the wool but a abort distance to the strippers, and thus, by the way, they are geared ; the "work ers " are rendered workers indeed, and not merely in name.