tool. The blanks are forced on the reamer by hand to a stop. The position of the stop is adjusted so that sufficient material will be removed from both ends of the blanks when the blank is edged in the next operation. The reamer revolves at approximately 300 RPM. 7. The edging operation consists in placing a reamed blank on a tapered mandrel and by means of two special cutters working in unison the ends of the blank are formed to conform in couture to a standard template. A second gauge is used to ensure proper length (6⅛"). In each case, the edged blank must rest on a tapered mandrel gauge in exactly the same position as the standard blank which is in the production box. The usual procedure is to make the necessary adjustments of the knives of the first blank which is edged so that it conforms to the standard, and then continue the operation on the rest of the blanks in the production box at the identical position of the first blank. Note; since there are 63 blanks for each standard blank it will be observed that every 63rd cylinder is checked mandrel gauge. The accuracy of the method and the facility with which it is done depending on the care and skill of the operator. This is the most critical of all the operations. The edging machine revolves at 2,200 RPM. 8. Following the edging operation is the stamping. This consists in applying a hot printing die to the thick end of the cylinder as it is placed accurately in a vertical position under the die. The heating of the die is done by means of a resistance wire coiled within a hollow torus near the under edge of the circular die. The coiled wire is connected to a source of current and the latter is adjusted by means of a rheostat. The heated died has raised lettering and makes an impression on the end surface of the wax cylinder. The depressed positive lettering on the cylinder is filled with a thick paste of zinc carbonate, the excess of which is brushed or wiped off after drying. 9. The cylinders are next shaved on a ganged shaving machine consisting of a rough shaving knife free from "blinds" and "lines", accurate concentricity and a minimum of taper. These factors depend on the tension of the driving belt,