DRAWING THROUGH.--Umbrella ferrules, pencil cases, cartridge cases, and a variety of articles are made by “drawing through.” The finest example of this process is seen in the manufacture of a metallic cartridge case, such as is used in the new Enfield-Martini rifle. I am indebted to Mr. T. R. Bayliss, Managing Director of the Birmingham Small Arms and Metal Company, for the following particulars. The brass is rolled to the required thickness.[51] It is then passed into a machine which forms it into a shallow cup. This machine consists of a tubular punch which cuts out a disc of 1.25 inch diameter, immediately upon which a solid plug passing through the tubular punch, presses the disc through a steel ring, so that it falls to the ground as a shallow brass cup. Three of these are produced by one blow of the press. The cups are heated in a muffle to a red heat, then dipped in dilute sulphuric acid to remove scale, washed, coated with soap and oil, and then passed through a second machine in which a slightly narrower punch forces the cup through a slightly narrower ring, and thus the cup, while retaining the same thickness at the bottom, is made slightly narrower and much deeper. Repetitions of the process (six altogether) produce a case rather more than half-an-inch wide and three inches long, which, when cut off to proper length, indented at the bottom for reception of the cap, and some other finishing processes gone through, is ready for the charge of powder. The process is applied to small articles like pencil cases, and at the Small Arms and Metal Company to cases as large as 5·20 inch diameter and 15 inch long.