EXAMPLE OF REGISTERING BEAM OF A TRACK SCALE FOR WEIGHING CARS, ANNOUNCING ADAPTABILITY TO METRIC WEIGHINGS.

The above "phantom" half tone illustrates the internal mechanism of the poise of our type registering beam. This mechanism is simple, strong, and durable, and is easily adjusted to give any desired pressure upon the ticket.

Our type registering beams can be adapted to the English system of tons, cwts., quarters, and pounds; also to the metric and Russian standards.

21767° S. Doc. 241, 64-1-3

33

METRIC RULES.

316.

317.

[Note varied equipment of metric rules available.]

[From a Chicago catalogue.]

87.50

Standard meter scale. See Catalog K for description..... .duty free.. $50.00 316A. Standard meter scale. See Catalog K for description.. ...duty free.. 77.50 316B. Standard meter scale. See Catalog K for description... -duty free.. Meter stick (school meter), of maple, 2 cm. square. One surface is plain and shows the length of the simple meter; the second face is graduated in tenths of meters, or decimeters; the third face is graduated in hundredths of meters, or centimeters; and the fourth face is graduated in thousandths of meters, or millimeters. The last named face gives divisions also in decimeters and centimeters. This piece is valuable in teaching students the metric system of lengths.. Meter stick, of boxwood. A high-grade stick graduated in millimeters.. 318A. Meter stick, of boxwood. Same as No. 318, but graduated in millimeters and inches...

318.

.75

1215

55

.67

319.

321.

322.

323.

Meter stick, of maple. One side is graduated in decimeters, centime-
ters, and millimeters; the other side in inches and eighths...
Meter stick, same as No. 319, but ends tipped with brass.
Meter stick, sam as No. 321, but two meters long, brass tipped..
Meter scale, of paper, graduated in millimeters. For use vertically;
zero at the top.

Each.

07 Per dozen.

323A. Meter scale, same as No. 323, but with zero at the bottom.

325. Metric rule, of maple, 12 inches long. Graduated on one edge in millimeters and on the other in 16ths of inches. Double bevel with protractor on back.

326.

Metric rule, of white celluloid, 6 inches long. One edge graduated in
mm., other edge in eighths of inches. May easily be carried in vest

.28

.35

1. 35

.60 .60

.40

4.50

327.

328.

Metric rule, of boxwood, 12 inches long. One edge beveled and accu-
rately graduated in millimeters, the other side of ruler graduated in
16ths of inches.

Metric rule, on heavy bond paper, 3.5 x 23.5 cm., graduated for 20 cm.
along one edge in mm. divisions.

.90

.75

NOTE FULL-LINE METRIC MEASURING RULES, SHOWING SAME PRICES FOR SIMILAR SIZES IN THE TWO SYSTEMS.

MACHINE DIVIDED STEEL RULES.

FLEXIBLE.

These rules are made of the finest quality spring tempered steel, very thin and flexible. From 1 to 12 inches they are inch wide, and will easily conform to a 2-inch circle. Rules from 18 to 36 inches are inch wide and a trifle heavier. Graduated one side only.

No. 3227-Marked one side, upper edge, millimeters; lower edge, half millimeters. Other side, upper edge, 16ths, 32nds, and 64ths inches; lower edge, 10ths, 20ths, 50ths, and 100ths inches.

No. 2200 M-Marked both sides, three edges in millimeters, one edge in millimeters.

These rules are made of finest quality spring tempered steel. They are the same widths as the regular tempered rules and about one-half the thickness, but heavier than the flexible rules.

No. 2600 M-Marked both sides, three edges in millimeters, one edge in millimeters.

These rules are made of the finest quality spring-tempered steel, very thin and flexible. Rules from 5 cm. to 30 cm. are approximately 12 mm. wide; rules from 40 cm. to 1 m. are approximately 19 mm. wide, and a trifle heavier.

No. 2100 M-Marked one side only, upper edge millimeters, lower edge millimeters.

No. 2300-Approximately 5 mm. wide, spring tempered, graduated one edge of one side in millimeters,

Lengths...

Wt. per doz.

Price per doz..

Packed one-half dozen in a box.

one edge of other side in millimeters.