Trade Wrinkles.

Specks of Iron in Pulp.—The minute specks of iron that fall into paper pulp and afterwards produce rust-stains may be removed from the pulp by the use of magnets. A huge steel comb, with broad teeth set edgewise, is placed in the stream of pulp and water as it passes upon the machine. The teeth being made of magnetized steel strips, any iron particles contained in the pulp are thus withdrawn.—Paper World.

Camphor Oil for Cleaning Rollers.—The Germans have resorted to the use of camphor oil for the purpose of cleaning rollers, type, wood-cuts, machinery, etc. Essence of turpentine, petroleum, and benzine have been abandoned for various reasons. First, because camphor oil is cheaper; secondly, because it is hygienic and purifies the atmosphere of the workshop; thirdly, it is as efficacious, and as prompt as the products hitherto employed; fourthly, it is not greasy, and therefore leaves no deposit.