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POCKET MEMORANDA.

A CONVENIENT POCKET-BOOK

FOR

ALL PERSONS INTERESTED IN

MECHANICAL ENGINEERING, STEAM ENGINEERING,
ELECTRICAL ENGINEERING, RAILROAD ENGINEERING,
BRIDGE ENGINEERING, ARCHITECTURE, PLUMBING, HEATING

AND VENTILATION, Gas FITTING, ETC., Etc.

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ENTERED ACCORDING TO THE ACT OF CONGRESS,

IN THE YEAR 1897, BY THE COLLIERY ENGINEER CO., IN THE OFFICE OF THE LIBRARIAN OF CONGRESS,

AT WASHINGTON.

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PREFACE TO THIRD EDITION.

we

once

а

It is with feelings of great satisfaction that

more announce new edition of the * Mechanics' Pocket Memoranda.” One of the principal advantages of our pocket-book has been its small size, thus making it a pocket-book in reality instead of in name only. This feature has been retained in the present edition. Notwithstanding that the pocket-book is three times as large as in the preceding edition, it is but a very little thicker, owing to our having eliminated the blank pages at the end. Much new matter has been inserted, and we particularly call attention to the sections relating to Civil Engineering; to Electrical Engineering ; to Plumbing, Heating and Ventilation ; and to those useful facts for Contractors, Carpenters, etc., which are contained in the section on Architecture.

Respectfully,
The International Correspondence Schools,

SCRANTON, PA.
JUNE 1, 1897.

X 8

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The first edition (2,000 copies) of the “Mechanics' Pocket Memoranda was issued last October, with the hope that it would prove useful to persons connected with Mechanical industries. Its claim to originality was that some of the principles given were stated more clearly and concisely than in more pretentious pocket-books. The popularity which it achieved was unexpected, and has induced us to issue a second edition in which a number of pages containing matter not strictly technical have been eliminated and the space devoted to practical Mechanical information. Considerable new matter relating to Architecture and Electricity has also been added.

We trust the present edition will prove even more satisfactory than the preceding one, and that Engineers, Draftsmen, Machinists, Pattern-makers, Blacksmiths, Foundrymen, Electricians, Architects, Builders, Carpenters, Plumbers, Steam Fitters, etc., will find it convenient and useful.

JUNE 1, 1894.

PAGE

233
255
253

14
148
170
190
173
174

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A.
Air inlet pipes....
, Velocity of flow of hot..

Vitiation of..
Alloys.
Ampere:

turns..
Annunciator systems.
Applications of Electric Motors
Armature, Bursting of..

B.
Batteries, Various chemical....
Storage...

Regulation of
Beams, Bending Moments in..

Cantilever..
Deflection of
fixed at both ends..

Safe loads on..
, Simple....

Standard connections for.
Bearing power of soils..
Bearings for line shafting, Distance apart of.
Belting, Leather, Arc of contact of.

, Horsepower transmitted by.

Pulleys for ....

Width of...
Rope, Power transmitted by.

Tension in
Bell Towers.

Wiring..
Bending moments in beams
Birmingham Wire Gauge.
Blasting in granite..
Blow, Force of a...
Blue Prints, To make..

Paper.
Boilers, Kitchen.

Connections for..
Steam..?
Dome of, To develop..
Foaming and Priming of.
Horsepower of
Inspection and care of
Prevention of scale in

slope sheet, To develop.
Bolts for cylinder heads...

for steam chests.
Standard proportions of.

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175-178
179–180

179
44
44
44

44
209-210

44
215
196
116
73
72
126

72
130
131
227
188

44
164
197
69
93
93
243
245
94
89
98
78
94
96
90
136
136

8

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66

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