|
Search over 100 encyclopedias and dictionaries: |
Research categories | Follow us on Twitter |
Research categories
View all topics in the newsView all reference sources at Encyclopedia.com |
|||
|
searchlight
searchlight device, usually swiveled, using a lens and reflecting surface to direct a powerful beam of light of nearly parallel rays. In 1892 such apparatus was used along the English Channel in coastal defense and later, in the South African War, as an aid to infantry movement. It was also used to... Read more |
|
Elmer Ambrose Sperry
Elmer Ambrose Sperry 1860-1930, American inventor, b. Cortland, N.Y. Although probably best known for his work on the gyroscope, he also invented the gyrocompass (1910), an extremely effective high-intensity searchlight, a new system of street lighting, and numerous electrical devices. He founded... Read more |
|
arc
arc in electricity, highly luminous and intensely hot discharge of electricity between two electrodes. The arc was discovered early in the 19th cent. by the English scientist Sir Humphry Davy, who so named it because of its shape. An arc is characterized by a high current, low voltage, and... Read more |
|
patrol
... Read more |
|
rhodium
rhodium , metallic chemical element; symbol Rh; at. no. 45; at. wt. 102.9055; m.p. about 1,966°C; b.p. 3,727±100°C; sp. gr. 12.41 at 20°C; valence +2, +3, +4, +5, or +6. Rhodium is a lustrous, silver-white, chemically resistant metal in the so-called platinum group of metals in... Read more |
|
Border patrols
Silvestre Reyes: 1944 Read more |
|
sight
... Read more |
|
barrier combat air patrol
... Read more |
|
Bering Sea Patrol
... Read more |
|
border
... Read more |
No reference documents or articles match the search term Military, Border Patrol Set Sights on NightHunter Searchlight.
Suggestions: