TABLE OF CONTENTS

Metric System of Weights and Measures

Conversion of Thermometric Scales

Correction of Thermometer Readings.

Correction of Barometer Readings

Gay Lussac's Law; Boyle's Law; Correction of the

Volumes of Gases for Temperature and Pressure; Law

of Partial Pressures

Relative Density of Solids, Liquids, and Gases; Vapour

Density.

17

Avogadro's Hypothesis; Density and Molecular Weight;

Valency, Equivalents, and Atomic Weights

Deduction of Empirical Formula from Percentage Compo-

sition. Formulæ of Minerals

To Calculate the Percentage Composition of a Compound

from its Formula.

Chemical Equations; to Calculate the Amount of Material

Required to Produce a Given Weight of any Substance,

or the Quantity of the Substance Produced by the De-

composition of a known Weight of the Material

Combination and Decomposition of Gaseous Bodies

Gas Analysis Calculations.

Calculation of the Results of Atomic Weight Determina-

tions

Calculations Involved in Indirect Analysis.

General Analytical Questions

Diferacion of
Grael

Solution of Gases in Liquids.

Solubility of Solids in Liquids; Molecular Weight and the

Lowering of the Freezing-Point of Solutions.

Exercises on the Specific Heat, Latent Heat, and Atomic

Heat of Substances.

PAGE

78

82

86

Heat of Solution; Heat of Combination ; Calorific Power

and Calorific Intensity

91

APPENDIX.

Table I.-Atomic Weights and Symbols of the Elements .

Table II.-Weight of One Cubic Centimetre of Atmo-

spheric Air at Different Temperatures from o° to 300°,

at 760 mm. Pressure

Table III.—The Weight of 1000 c. c. of Water at t ̊C.,

when Determined by Means of Brass Weights in Air of

o°C., and at a Tension o'76 m., is equal to 1000-x

grams

Table IV.-Volume and Density of Water at Different

Temperatures

97

Table V.-For the Calculation of

I

I+0'00367.7.

Table VI.-Vapour Pressure (Tension) of Water .

Table VII.--For the Conversion of Degrees (T') of a

Mercurial Thermometer into the Corresponding Values

of an Air Thermometer.

104

Table VIII.-Table for Correction of Thermometer Read-

CHEMICAL CALCULATIONS.

METRIC SYSTEM OF

WEIGHTS AND MEASURES.

MEASURES OF LENGTH.

Standard :—1 metre, the length at o°C. of a platinum bar preserved in Paris. Originally constructed to represent the 40000000 part of the earth's circumference, measured along the Paris meridian; according to modern measurements it does not fulfil this intention and can therefore only be viewed as an empirical standard.

Standard:-1 kilogram, the mass of a piece of platinum weighed in vacuo; preserved in Paris.

Theoretically the gram equals the mass of Ic.c. and the kilogram the mass of 1000 c.c. of distilled water at 4°C., at the latitude of Paris; the actual standard differs slightly from its value as thus defined.

=

log. grains.

To reduce grams to grains.

Log. grams + 1*188432

To reduce cubic centimetres to cubic inches.

Log. c.c.+(-27855224) = log. cubic inches.

To reduce millimetres to inches.

log. inches.

log. grams.

To convert grains into grams.

To convert cubic inches into cubic centimetres.

=

Log. cb. in. + 12144776 log. c.c.

To convert inches into millimetres.
Log. inches+ 1°4048258 = log. mm.