Secrets, Signs, Signals & Codes


Book Description

Discusses codes, silent signals, invisible writing, and other ways to conceal messages.




Secret Codes


Book Description







Signs, Signals and Symbols


Book Description

Originally published in 1963, this title was an attempt to provide a new basis for the discipline of Speech Therapy. This was the first work to be published in England relating speech pathology to the wider study of human communication. It also contains results of original research into the problems of Dyslalia and Stammering. Several chapters are devoted to accounts of diagnostic measures and aids.




Scout's Book of Signs, Signals and Symbols


Book Description

First published nearly a century ago, this practical reference provides scouts and other lovers of the outdoors with an ever-useful guide to following trails and interpreting their surroundings.







Codes and Ciphers - A History of Cryptography


Book Description

This vintage book contains Alexander D’Agapeyeff’s famous 1939 work, Codes and Ciphers - A History of Cryptography. Cryptography is the employment of codes and ciphers to protect secrets, and it has a long and interesting history. This fantastic volume offers a detailed history of cryptography from ancient times to modernity, written by the Russian-born English cryptographer, Alexander D'Agapeyeff. The contents include: - The beginnings of Cryptography - From the Middle Ages Onwards - Signals, Signs, and Secret Languages - Commercial Codes - Military Codes and Ciphers - Types of Codes and Ciphers - Methods of Deciphering Many antiquarian texts such as this, especially those dating back to the 1900s and before, are increasingly hard to come by and expensive, and it is with this in mind that we are republishing this book now in an affordable, modern, high quality edition. It comes complete with a specially commissioned new biography of the author.




Children's Catalog


Book Description

The 1st ed. includes an index to v. 28-36 of St. Nicholas.




The Pearl Harbor Secret


Book Description

This book provides a penetrating look into Franklin D. Roosevelt's strategy to bait Adolf Hitler into declaring war on America in order to defeat Germany militarily, thus preventing the Nazis from developing the atomic bomb. In late 1939, President Roosevelt learned that Hitler was attempting to develop an atomic bomb to use against the United States. The president responded by directing his own scientific community to develop an atomic bomb and began making plans to go to war with Germany. However, he was hampered by public opinion, with 80 percent of the American people against U.S. involvement in another ground war in Europe. Roosevelt seized an opportunity in 1940, when Japan and Nazi Germany formed a military alliance. To bait Germany into war, FDR shut down Japan's war-making economy, prompting Tokyo to attack Pearl Harbor. A few days later, Hitler declared war on America. Using declassified documents, this book shows how Pearl Harbor was not about Japan; it was about the United States going to war with Germany. It reveals how the U.S. Navy's intelligence gathering system could break virtually any Japanese naval code, but Admiral Husband E. Kimmel, the commander of the U.S. Pacific Fleet, was kept in the dark about the impending Pearl Harbor attack by his own government.




Hidden Secrets


Book Description

History of espionage around the world including descriptions of the technology used.