Air brush and connections. Pens, Payzant's, 1 set. Beam compass. *Pencils, best quality, graded Bow pen, drop spring. leads. *Bow pen, steel spring. *Protractor. Bow pencil, steel spring. Railroad curves, pearwood, 1 set. *Brushes, red sable. Railroad pen. China saucers. *Railroad pencil. *Color box. Reading glass. *Compass, pen and pencil points. *Reducing glass. Crayons, assorted colors. *Ruling pen. Curve rule, adjustable. Scale, boxwood, 12 inches long, *Dividers, plain. with divisions of millimeters *Dividers, proportional. and inches. Dividers, steel spring. Scales, boxwood, triangular. Drawing boards, several sizes. Section liner (parallel ruling Eraser, glass. device). *Eraser, rubber, hard. Straightedge, steel, 24 inches. *Eraser, rubber, soft. Straightedge, steel, 36 inches, *Eraser, steel. with divisions for hundredths Erasing shield. of an inch and millimeters. *French curves, xylonite. *Straightedge, wood, 24 inches. Microscope, low power and Swivel or curve pen. lenses. Thumb tacks. Palette knife. Tracing point, steel. Pantograph. *Triangle, 45°. Pens, double-pointed. *Triangle, 60°. *Pens, Gillott's, Nos. 170, *T square, pearwood, xylonite edge. 290, 291. *Tweezers, dentist's. Pens, K. & E., drawing. No. 3202. CLASSIFICATION OF MATERIAL. The draftsman handling the drawings and other original material submitted by the author of a report for its illustration should first group them, as far as possible, into kinds or classes, in order that he may decide how each illustration should be prepared (1) to express most effectively the author's purpose, (2) to insure reasonable economy in preparation and in reproduction, and (3) to meet the requirements of the processes of reproduction selected. All similar illustrations for one publication should be prepared in the same general style. In a series of geologic sections, for example, the same lithologic symbols should be used throughout for the same kinds of rocks. The titles, explanations, and captions of the maps should also agree with one another in general style and in details of workmanship.