DIAGRAMS
Reading edition
fig. page
1.Principle of Galvanometer30
2.String Galvanometer31
3.Duddell Thermo-Galvanometer39
4.Construction of a Voltmeter64
5.The Working of a Refrigerating Machine70
6.Hertz's Machine155
7.Hertz "Detector"156
8. 9. 10.Wireless Waves158
11.A Wireless Antenna164
12.Poulsen's Machine166
13. 14.How Pictures are sent by Wire177
15.Message received by Telewriter189