X 
LIST OF ILLUSTRATIONS . 
Fig. Page- 
31 Signals for Pneumatic Tubes ....... 69 
32 Apparatus for Finding Position of Stopped Carrier . . 70 
33a Machinery for Pneumatic Tubes . . . . . .73 
33 b Machinery for Pneumatic Tubes . . . . . . . 75 
34 Waleker’s Compressed Air Bell.77 
35 Experiments at Folkestone . . . . . . . . 9 7 
36 Vertebrated Shore Cable ........ 99 
37 Yertebrated Shore Cable (stronger) . . . . 99* 
38 Brett’s Protected Cable ........ 100 
39 Laying the Channel Cable . . . . . ... 103 
40 The Channel Cable when Taken up . . . . . .104 
41 Pulleys for Winding Wires . . . . . . . 107 
42 Tools for Joining Wires . . . . . . . .103 
43 Joining of Wires .......... 108- 
44 Joining of Wires ......... 109 
45 Iron Posts ........... Ill 
46 Mode of Fixing Iron Posts . . . . . . .112 
47 Siemens’ Posts . . . . . . . . . . 113 
48 Oppenheimer’s Posts . . . . . . . . .115 
49 Oppenheimer’s Posts . . . . . . . ..115 
50 Lee and Rogers’ Iron Posts . . . . . . .116 
51 Insulators ........... 117 
52 Insulators . . . . . . . . . . .117 
53 Insulators . . . . . . . . . . 119 
54 Insulators ........... 119 
55 Insulators (supports) . . . . . . . 119 
56 Insulators ........... 120 
57 Insulators 120 
58 Insulators and Supports . . . . . . . .121 
59 Insulators and Supports . . . . . . . . 122: 
60 Insulators and Supports . . . . . . . .122 
61 Insulators and Supports ........ 123 
62 Insulators and Supports . . . . . . . .123- 
63 Insulators (Attachments) . . . . . . . 124 
64 Insulators (Attachments) ........ 124 
65 Insulators (Attachments) . . . . . . 125 
66 Stretcher.125 
67 Stretchers.126 
68 Stretchers ........... 126 
69 Stretchers.126 
