Measures to secure a patent for improvements in the above have been taken by John B. Tarr, of Albany, N. Y. The nature of the improvement consists in the use of a set of cutters, called by the inventor side finishers, which are arranged in any proper manner to suitable stocks in conjunction with the groove and tongue cutters. It being intended by means of the above, to plane the sides of the grooves and tongues, as they are shaped. The advantages of this improvement are, that, by its employment, a better joint may be formed than can be done by the machine now generally used.