Usage of terminology is not uniform across the English-speaking world (see below). In more modern usage, the playback device is often called a "turntable", "record player" or "record changer". When us ...
In 1891, Bell had begun experiments to develop motor-powered heavier-than-air aircraft. The AEA was first formed as Bell shared the vision to fly with his wife, who advised him to seek "young" help as ...
In 1870, at age 23, Bell, his brother's widow, Caroline (Margaret Ottaway), and his parents travelled on the SS Nestorian to Canada. After landing at Quebec City the Bells transferred to another steam ...
Alexander Bell was born in Edinburgh, Scotland on March 3, 1847. The family home was at 16 South Charlotte Street, and has a stone inscription, marking it as Alexander Graham Bell's birthplace. He had ...
The invention of the transistor in 1947 dramatically changed the technology used in telephone systems and in the long-distance transmission networks. With the development of electronic switching syste ...
Main articles: History of the telephone and Timeline of the telephoneFurther information: Invention of the telephone, Elisha Gray and Alexander Bell telephone controversy and Canadian Parliamentary Mo ...
Crookes made a career of being a meteorologist and lecturer at multiple places. Crookes worked in both the fields of chemistry and physics. The salient characteristic of his work was the originality o ...
The radiometer is made from a glass bulb from which much of the air has been removed to form a partial vacuum. Inside the bulb, on a low friction spindle, is a rotor with several (usually four) vertic ...
James Harrison was born at St Johns (near Renton), Dunbartonshire, Scotland, the son of a fisherman. He trained as a printing apprentice in Glasgow and worked in London before emigrating to Sydney, Au ...
A single-acting steam hammer is raised by the pressure of steam injected into the lower part of a cylinder and drops under gravity when the pressure is released. With the more common double-acting ste ...
His father Alexander Nasmyth was a landscape and portrait painter in Edinburgh, where James was born. One of Alexander's hobbies was mechanics and he employed nearly all his spare time in his workshop ...
The , $ and _ signs are not defined inside the ITU recommendation on Morse code.Exclamation MarkThere is no standard representation for the exclamation mark (!), although the KW digraph (– · – · ...
Beginning in 1836, the American artist Samuel F. B. Morse, the American physicist Joseph Henry, and Alfred Vail developed an electrical telegraph system. This system sent pulses of electric current al ...
Morse was a leader in the anti-Catholic and anti-immigration movement of the mid-19th century. In 1836, he ran unsuccessfully for mayor of New York under the anti-immigrant Nativist Party's banner, re ...
Samuel F. B. Morse was born in Charlestown, Massachusetts, the first child of the pastor Jedidiah Morse (1761–1826), who was also a geographer, and his wife Elizabeth Ann Finley Breese (1766–1828). ...
