T h e A u t o m a t ic A ge
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items as conveyors and elevators, prony
brakes, thermometers, various types of
boilers, solar engines, oil-fuel burners,
condensers, evaporators, corliss and other
valve gears, governors, gas engines, water
motors of various descriptions, air ship?,
motors and dynamos, automobiles and
motor bicycles, railway block signals, car
couplers, link and gear motions, ball bear
ings, breech block mechanism for heavy
guns, and a large accumulation of others
o f equal importance. The descriptions are
terse, clear and will cover the points to
be made. Several types of perpetual mo
tion machines find a place, although the
author in the preface declares he has not
the slightest desire to encourage the hope
less pursuit of perpetual motion. It may
be said that the whole field of mechan:cs
is covered by this volume and every in
ventor, patent attorney, machinist, engineer
and all others engaged in the mechanical
arts or interested in fhe design o f any
form o f machinery should possess this
valuable work. Sixth Revised and enlarged
edition. Over 1,000 special engravings.
— Order of Autom atic Age.
ELECTRICITY FOR BEGINNERS, an
elementary work on electricity written
in non-technical lan^uape by Edward
Harper Thomas, author of “ Forty
Elementary Lessons in Electricity,”
prepared originally for manual training
classes in grade schools, published by
Norman W. Henley Publ;shincc Co... New
York City. 172 pages, illustrated. Price
$1.50.
■
The reader o f this book will find it valu
able as a fundamental text and introductory
to a more advanced study of the sub
ject. The average reader or student knows
little about electricity other than its
manifestations unless he has taken it as a
special branch. The idea of this work
originated in a request some years ago
from the public schools for something
simple enough to be used in manual train
ing work. The author examined a large
number o f text books and found them any
thing but simple and not at all funda
mental. He conceived the idea of forty
elementary lessons in electricity which
would be given out in leaflet form to the
schools requesting them, thus supplying
one lesson a week for the entire school
year. These proved popular. They were
© International Arcade Museum
subsequently brought into a small book and
an edition of them was pupblished. This
edition was quickly exhausted and the
publishers of this volume had the author
revise and enlarge the lessons in the form
they now appear.
The purpose was to make the book en
tertaining as well as instructive and the
publisher feels that the author has
succeeded in doing this. Every chapter
of the first book was revised and enlarged
and the chapters on Gas Ignition, The
Telegraph, The Telephone, Induction, Self
Induction, Transformation, Alternators,
Multiphase Circuits, Electroplating, Elec
tric Heating, Smelting and Welding,
Electro-Magnetic Waves, The Watt-Hour
Meter. History of the Telephone, Sound
and the Telephone, and the Telephone and
Its Parts were added, increasing the
original forty lessons to fifty-five.
This volrme contains an immense amount
o f useful information boiled down in short,
easily pssimPated chapters. The student,
either of school age or o f more mature
rrrnd who wishes to start the study of
electricity in the very kindergarter of the
subject can do not better than obtain his
introduction to the fascinating science
described so clearly By Mr. Thomas, by a
<***reful perusal o f his interesting work.
The subiect matter is accurate in state
ment o f fact, the diagrams are clear and
the exposition concise and to the point. It
is an ideal medium for teaching the begin
ner, e:ther in the class room or by home
study.
— Order of Autom atic Age.
Are 10-cent tables in drug stores just
dime foolishness? Of the 8,440 druggists
queried by Drug Trade News, 43.8 per cent
answered that they are now operating or
intend shortly to operate 10-cent depart
ment. But manufacturers who sell goods
in 10-cent units— drug stores now handle
about 450 such items— are often hesitant
about taking druggists' orders, fearing
price cuts and consequent injury in their
business with the regular 10-cent chains.
American Druggist predicts that wholesale
houses will confine 10-cent sizes to un
branded sundries, household remedies and
toiletries.
— The Business Week.
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