Chapter III: Alphabets or systems of signals

Signal alphabets:
American Morse 45
Continental Morse 45
Army and navy 45
Abbreviations 46
Code calls 47
Execution of signal alphabets 47
The army and navy alphabet 47
The Morse alphabets 49
International code of signals:
Description 51
Two-arm semaphore 51
The Ardois system 52
Coston signals 54
Very's night signals 54
Rocket signaling 55
Two-arm semaphore alphabet, U. S. Navy 57
Summary of signals, army and navy alphabet 60

CHAPTER IV.--_The field message._
Definition 64
The blank form 64
Writing the message 66
Instructions to operators:
Use of message blank 66
Duties of sending operators 66
Order of transmission 66
Duties of receiving operators 67
Communications confidential 67
Checking the message 67