aerial telegraphy造句

• Since aerial telegraphy was sometimes conducted within the clear sight of the enemy, security was a major problem.
• Both accomplished tactical and strategic communications for the warring armies, including electromagnetic telegraphy and aerial telegraphy ( " wig-wag " signaling ).
• He invented a signaling system using a flag ( or a kerosene torch for nighttime use ) that is known as wig-wag signaling, or aerial telegraphy.
• Butterfield was concerned about Confederate interception of aerial telegraphy signals, but he used this as an advantage, ordering deceptive messages to be transmitted early in the campaign to mask the Union Army's true intentions.
• In October, 1899, the progress of the yachts in the international race between the Columbia and Shamrock was successfully reported by aerial telegraphy, as many as 4, 000 words having been ( as is said ) despatched from the two ship stations to the shore stations.
• He engaged in private medical practice in Florida and then sought a commission as a U . S . Army assistant surgeon ( lieutenant ), entering service September 18, 1854, posted at Fort Duncan, Texas, and " wig-wag " signaling or " aerial telegraphy ", would be adopted and used by both sides in the Civil War and afterwards.