align="left">Plan view of electric iron
140 |
| 100. |
Section of electric iron |
141 |
| 101. |
Thermo-electric couple |
143 |
| 102. |
Cutting a magnetic field |
146 |
| 103. |
Alternations, first position |
148 |
| 104. |
Alternations, second position |
148 |
| 105. |
Alternations, third position |
148 |
| 106. |
Alternations, fourth position |
148 |
| 107. |
Increasing alternations, first view |
149 |
| 108. |
Increasing alternations, second view |
149 |
| 109. |
Connection of alternating dynamo armature |
150 |
| 110. |
Direct current dynamo |
151 |
| 111. |
Circuit wires in direct current dynamo |
152 |
| 112. |
Alternating polarity lines |
154 |
| 113. |
Alternating current dynamo |
155 |
| 114. |
Choking coil |
157 |
| 115. |
A transformer |
158 |
| 116. |
Parallel carbons |
164 |
| 117. |
Arc-lighting circuit |
165 |
| 118. |
Interrupted conductor |
166 |
| 119. |
Incandescent circuit |
167 |
| 120. |
Magnetic action in dynamo, 1st |
177 |
| 121. |
Magnetic action in dynamo, 2d |
177 |
| 122. |
Magnetic action in dynamo, 3d |
178 |
| 123. |
Magnetic action in dynamo, 4th |
178p. xi |
| 124. |
Magnetic action in motor, 1st |
179 |
| 125. |
Magnetic action in motor, 2d |
179 |
| 126. |
Magnetic action in motor, 3d |
180 |
| 127. |
Magnetic action in motor, 4th |
180 |
p. 1
INTRODUCTORY
Electricity, like every science, presents two phases to the student, one belonging to a theoretical knowledge, and the other which pertains to the practical application of that knowledge. The boy is directly interested in the practical use which he can make of this wonderful phenomenon in nature.
It is, in reality, the most successful avenue by which he may obtain the theory, for he learns the abstract more readily from
