The following tables are sufficient to enable anyone to readily convert the metric into the customary units, and are based on those published by the U. S. Bureau of Standards.

Lengths

Inches

Centimeters

Inches

Centimeters

0.3937

= 1

1

= 2.5400

0.7874

= 2

2

= 5.0800

1.1811

= 3

3

= 7.6200

1.5748

= 4

4

= 10.1600

1.9685

= 5

5

= 12.7000

2.3622

= 6

6

= 15.2400

2.7559

= 7

7

= 17.7800

3.1496

= 8

8

= 20.3200

3.5433

= 9

9

= 22.8600

Areas

Square Inches

Square Centimeters

Square Inches

Square Centimeters

0.1550

= 1

1

= 6.452

0.3100

= 2

2

= 12.903

0.4650

= 3

3

= 19.355

0.6200

= 4

4

= 25.807

0.7750

= 5

5

= 32.258

0.9300

= 6

6

= 38.710

1.0850

= 7

7

= 45.161

1.2400

= 8

8

= 51.613

I.3950

= 9

9

= 58.065

Masses

Grains

Grams

Grains

Grams

1

=0.0648

15.4324

= 1

2

=0.1296

30.8647

= 2

3

=0.1944

46.2971

= 3

4

=0.2592

61.7294

= 4

5

=0.3240

77.1618

= 5

6

=0.3888

92.5941

= 6

7

=0.4536

108.0265

= 7

8

=0.5184

123.4589

= 8

9

=0.5832

138.8912

= 9

Liquids

Cubic Centimeters

Minims

Cubic Centimeters

Fluid Ounces

1

= 16.230

29.574

= 1

2

= 32.460

59.147

= 2

3

= 48.690

88.721

= 3

4

= 64.920

118.295

= 4

5

= 81.150

147.869

= 5

6

= 97.380

177.442

= 6

7

= 113.610

207.016

= 7

8

= 129.840

236.590

= 8

9

= 146.070

266.163

= 9

The U. S. gallon = 3785.43 ccm; one liter = 33 fld. oz., 391 minims.

The above tables apply to the English weights and measures, with the exception of the liquid measures; the English gallon measures 160 fld. oz. = 4545.96 ccm.

The following therefore must be used for conversion of the same.

Cubic Centimeters

Minims

Cubic Centimeters

Fluid Ounces

1

= 16.894

28.4123

= 1

2

= 33.788

56.8245

= 2

3

= 50.682

85.2368

= 3

4

= 67.576

113.6490

=4

5

= 84.470

142.0613

= 5

6

= 101.364

170.4735

=6

7

= 118.258

198.8858

= 7

8

=135.152

227.2980

= 8

9

= 153.046

255.7103

= 9

Possible Sources Of Various Dyes

(Where no names are given the dye is sufficiently common to be obtained from almost any maker.)

Acid green JE. Sherwin Williams Co., 11 Stillings St., Boston.

Acid yellow. National Aniline & Chemical Co., 21 Burling Slip New York.

Acid rhodamin. H. A. Metz & Co., Inc., 122 Hudson Street New York.

Aesculin. Merck & Co., 45 Park Place, New York.

Alizarin-cyanol. Cassella.

Auramin. Eastman Kodak Co., Rochester, N. Y. A pure variety is sold under the name of Pyoktanin aureum by Merck & Co.

Aurantia. Aurophenin. National Aniline & Chemical Co.; E. I. du Pont de Nemours & Co., Inc., Wilmington, Del.

Bluish acid green. Sherwin Williams Co., Bachmeier & Co.

Bluish fast green. Sherwin Williams Co., Bachmeier & Co.

Carmin. Any drug store.

Carmine blue. Merck & Co.

Chrysoidin Y. Bachmeier & Co., 261 Franklin St., Boston, Mass.

Chrysophenin. National Aniline & Chemical Co.

Crystal violet. H. A. Metz & Co.

Curcumin. Eastman Kodak Co.

Cyanin. H. A. Metz & Co.

Diamin blue. National Aniline & Chemical Co., Schoelkopff Branch, Buffalo, N. Y. Sold as Niagara blue 4B.

Eosin, yellowish. Erythrosin.

Fuchsin. Bachmeier & Co.

Glycin red. Kinzelberger, Prag, Czechoslovakia.

Indulin blue. Bachmeier & Co.

Janus red B. H. A. Metz & Co.

Lanafuchsin. Cassella.

Malachite green. Eastman Kodak Co. Methylene blue. Eastman Kodak Co.

Methyl violet.

Mikado yellow. H. A. Metz & Co.

Naphthol green. Bachmeier & Co. Naphthol yellow.

Orthochrom T. Eastman Kodak Co.

Patent blue. H. A. Metz & Co.

Pinachrom. H. A. Metz & Co.

Phenosafranin. Bachmeier & Co.

Pinaflavol. H. A. Metz & Co.

Ponceau.

Primrose. Also sold as naphthol yellow by most makers.

Prussian blue. Merck & Co.

Pyronin G. National Aniline & Chemical Co.

Quinolin yellow. H. A. Metz & Co.

Safranin Y. Bachmeier & Co.

Sensitol green & violet. Ilford, Ltd., Ilford, London, England.

Tartrazin.

Thionin blue. H. A. Metz & Co.

Toluidin blue. H. A. Metz & Co.

Vesuvin. Sold as Bismarck brown. Victoria blue B.

Xylene red B. H. A. Metz & Co.