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COLD STORAGE TEMPERATURES. — (Continued.) Tomatoes. 32-42 Watermelons.

34-40 Tobacco. 35–42 Wheat Flour.

40–42 Veal.. 32-36 Wines..

40-50 Vegetables.. 34-40 Woolens.

25-35

THE DISTANCE IN NAUTICAL MILES BETWEEN

COLON AND

Acapulco
Antofagasta.
Bahia.
Baltimore.
Boston..
Buenos Aires.
Callao.
Caracas.
Cartagena
Cayenne.
Charleston.
Desterro.
Galveston.
Georgetown.
Guayaquil
Halifax.
Havana.
Iquique.
Jacksonville.
Juneau..
Key West.
Kingston..
Les Cayes..
Liverpool.
Manzanillo.
Mazatlan..
Montevideo.

Miles.
1426 New Orleans..
2140 New York.
3928 Norfolk.
1903 Para.
2144 Parahiba.
5768 Paramaribo.
1346 Pernambuco.
841 Philadelphia.
281 Port au Prince.
1930 Portland.
1566 Quebec..
4925 Rio de Janeiro.
1499 Sabanilla.
1864 St. Thomas.

793 Salina Cruz.
2570 San Diego.
1007 San Francisco.
1987 San Salvador.
1518 Savannah.
4945 Seattle.
1070 Sitka..
546 Tampico.
647 Valdivia.
4548 Valparaiso.
1760 Vera Cruz.
2060 Victoria, B. C....
5646

Miles. 1395 1970 1781 2629 3250 1750 3529 1949

774 3895 3295 4609

315 1029 1170 2843 3245

840 1565 4076 4547 1491 2983 2616 1426 4154

SECTION VII.

MATHEMATICAL TABLES.

(Reproduced by permission of Messrs. Lippincott from

Suplee's Mechanical Engineers Reference Book.”)

THE METRIC SYSTEM.

The principal advantage of the metric system consists in its use of the

1 decimal subdivisions. The attempt to consider the metre as

of

10,000,000 a quadrant of the earth's surface has been abandoned, and it is now held only to be the length of the standard known as the Mètre des Archives, copies of which are issued by the Bureau Internationale des Poids et Mésures, at Breteuil, near Paris.

The kilogramme was originally intended to be the weight of a cubic decimetre or litre of pure water at the temperature of maximum density, but it is really now considered only as the weight of a platinum standard. At the same time, this relation between the unit of weight and a standard volume of water is sufficiently close for the specific gravity of any substance to be considered as equal to the weight of a cubic decimetre of that substance. In all hydraulic measurements a cubic metre of water is equal in weight to the metric tonne of 1000 kilogrammes, a most convenient fact in the determination of the power developed by a given fall and volume of water.

The French Metrical System. The French units of weight, measure, and coin are arranged into a perfect decimal system, except those of time and the circle. The division and multiplication of the units are expressed by Latin and Greek names, as follows: Latin, Division.

Greek, Multiplication. Milli 1000th of the unit.

Deca 10 times the unit. Centi = 100th of the unit.

Hecato 100 times the unit. Deci = 10th of the unit.

Kilio 1000 times the unit. Metre, litre, stere, are, franc, Myrio 10000 times the unit. gramme.

French Measure of Length. 1 millimetre 0.03937 inch. 1 metre (unit) 3.28083 feet. 1 centimetre 0.3937 inch.

1 decametre 32.8083 feet. 1 decimetre 3.937 inches.

1 hectometre 328.083 feet. 1 metre (unit) 39.37 inches.

1 kilometre 3280.83 ft. = 0.62137 1 sea mile =1853.25 metres.

mile. 1 kilometre = 0.53959 sea mile. 1 statute mile 1.60935 kilomets.

1 kilometre

49.7096 chains.

1 square metre
1 are
1 decare
1 hectare

French Measure of Surface. 10.764 square feet. 1 are

= 1076.4 square feet. 100 square metres. 1 decare

107.64 square feet. 10 ares. 1 hectare

2.471 Eng. acres. 100 ares.

1 square mile 259 hectares.

1 stere (cubic

metre) 1 stere 1 litre 1 decistere

French Measure of Volume.

1 stere 10 decasteres.

= 35.314 Eng. cubic feet.

1 litre = 61.023 Eng. cub. inches. 1000 litres.

1 gallon 3.7854 litres. =1 cubic decimetre. 11 decistere - 2.838 bushels (nearly).

3.5314 cubic feet.

French Measure of Weight. 1 ton

= 1 cubic metre dis- | 1 gramme

tilled water. 1 decigramme 1 ton

= 1000 kilogrammes. 1 centigramme 1 kilogramme 1000 grammes. 1 kilogramme 1 hectogramme 100 grammes. 1 decagramme 10 grammes.

1 Eng. pound 1 gramme

1 cubic centimetre 1 gramme

distilled water. 1 English ton 1 Tranch tan

10 decigrammes.
10 centigrammes.
10 milligrammes.
2.20462 pounds av-

oirdupois.
0.45359 kilograms.
15.43 grains troy.
1.016 French tons.

n ne an

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