es.

The book is a simple, objective presentation of the subject as opposed
to a formal and mathematical one. It is intended for the third-year
high-school pupils and is therefore adapted in style and method of
treatment to the needs of students between the ages of fifteen and
eighteen. It especially emphasizes the historical and practical aspects
of the subject and connects the study very intimately with facts of
daily observation and experience.

The authors have made a careful distinction between the class of
experiments which are essentially laboratory problems and those which
belong more properly to the classroom and the lecture table. The former
are grouped into a Laboratory Manual which is designed for use in
connection with the text. The two books are not, however, organically
connected, each being complete in itself.

All the experiments included in the work have been carefully chosen with
reference to their usefulness as effective classroom demonstrations.

GINN AND COMPANY PUBLISHERS

APPENDIX A

LIST OF THE ELEMENTS, THEIR SYMBOLS, AND ATOMIC WEIGHTS

The more important elements are marked with an asterisk

O = 16

*Antimony Sb 120.2
*Argon A 39.9
*Arsenic As 75.0
*Barium Ba 137.4
Beryllium Be 9.1
*Bismuth Bi 208.5
*Boron B 11.0
*Bromine Br 79.96
*Cadmium Cd 112.4
Caesium Cs 132.9
*Calcium Ca 40.1
*Carbon C 12.00
Cerium Ce 140.25
*Chlorine Cl 35.45
*Chromium Cr 52.1
*Cobalt Co 59.0
Columbium Cb 94.0
*Copper Cu 63.6
Erbium Er 166.0
*Fluorine F 19.0
Gadolinium Gd 156.0
Gallium Ga 70.0
Germanium Ge 72.5
*Gold Au 197.2
Helium He 4.0
*Hydrogen H 1.008
Indium In 115.0
*Iodine I 126.97
Iridium Ir 193.0
*Iron Fe 55.9
Krypton Kr 81.8
Lanthanum La 138.9
*Lead Pb 206.9
Lithium Li 7.03
*Magnesium Mg 24.36
*Manganese Mn 55.0
*Mercury Hg 200.0
Molybdenum Mo 96.0
Neodymium Nd 143.6
Neon Ne 20.0
*Nickel Ni 58.7
*Nitrogen N 14.04
Osmium Os 191.0
*Oxygen