Read Online The Dead Media Notebook by Bruce Sterling, Richard Kadrey, Tom Jennings, Tom Whitwell - Free Book Online
Ads: Link
invented by Gravesande, about a century and a half ago.[circa 1718?].
In 1861, officers of the United States Coast Survey, at work in the Lake Superior regions, demonstrated the usefulness of the mirror, equatorially mounted, for telegraphic purposes, and succeeded in conveying their signals with ease and rapidity a distance of ninety miles.
During the same year, Moses G. Farmer, an American electrician, a man of infinite invention succeeded in thus telegraphing along the Massachusetts coast from Hull to Nantasket. The next year some English officers introduced the system into the British navy, with modifications and improvement, using at night an electric or calcium light. The signals communicated are made by alternately exposing and cutting off continuous rays of light reflected from one station to another.
MANCE HELIOGRAPH, “an instrument used by the English, telegraphing is done by pressing a finger key, whereby, flashes of light, of long or short duration, are emitted. These flashes and intervals or spaces are easily made to indicate what in the Morse alphabet are shown by dots, spaces, and dashes.In this way the Morse alphabet may be telegraphed as easily as by an electrized wire. Indeed, ungodly parties have before now, at church, telegraphed across the room without awakening suspicion, by a mere movement of the eyelids.
It is reported that during the seige of Paris (1870-1), messages were telegraphed therefrom twenty and thirty miles, by the reflection of calcium lights..
The Mance Heliograph is easily operated by one man, and as it weighs but about seven pounds, the operator can readily carry it and the tripod on which it rests.
During the Jowaki Afridi expedition sent out by the British-Indian government (1877-8), the heliograph was first fairly tested in war.
THE HELIOSTAT, “is said to be the first instrument for mirror telegraphy used in war [which war is not explicitly indicated, but likely the US Civil War]. The mirror receives and reflects the sun’s rays, and a clockwork attachment keeps the mirror position to receive the direct sunbeams,which in Nevada, U.S., are said to be so bright as to be hurtful to the eye at a distance of forty miles. Behind the mirror, in the very center, some of the quicksilver is removed, leaving a very small, round, clear space in the glass, through which the operator looks and may watch the reflection from the next station.
THE HELIOTROPE reflects the rays by mirrors but has no clockwork.
Source: Plum, William Rattle, 1845-1927. The military telegraph during the Civil War in the United States, with an exposition of ancient and modern means of communication, and of the federal and Confederate cipher systems; also a running account of the war between the states. Microform. PUBLISHER Chicago : Jansen, McClurg & Co.,1882. PHYSDESC 2 v. : ill., port., maps, facsim. SERIES 1) Microbook library of American civilization; LAC 22395.
The 17 th century app store: Schott’s Organum Mathematicum
From Bradley O’Neill
[This machine was essentially an encyclopedia for the various mathematical tasks any 17 th century ‘learned gentlemen’ might face. The bone tablets mentioned herein can be thought of as ‘applications’ in the contemporary sense. Each tablet was a long strip swathed with specific calculation rules and tables for specific areas of learning. All of the tablets can be catalogued, retrieved, and cross-referenced from within a large slanted dais.. To my knowledge, this device was one of the first western efforts to collect disparate and specific mathematical applications together in one body.]
Built by Gaspard Schott, Rome, 1666. Based on John Napier’s multiplying rulers (aka Napier’s Bones) of the previous century, the Organum Mathematicum was “a large box in which are stored ten different sets of bone-like tablets for performing a variety of different tasks.” There were tablets used for:
ARITHMETIC: a standard set of Napier’s bones together with
In 1861, officers of the United States Coast Survey, at work in the Lake Superior regions, demonstrated the usefulness of the mirror, equatorially mounted, for telegraphic purposes, and succeeded in conveying their signals with ease and rapidity a distance of ninety miles.
During the same year, Moses G. Farmer, an American electrician, a man of infinite invention succeeded in thus telegraphing along the Massachusetts coast from Hull to Nantasket. The next year some English officers introduced the system into the British navy, with modifications and improvement, using at night an electric or calcium light. The signals communicated are made by alternately exposing and cutting off continuous rays of light reflected from one station to another.
MANCE HELIOGRAPH, “an instrument used by the English, telegraphing is done by pressing a finger key, whereby, flashes of light, of long or short duration, are emitted. These flashes and intervals or spaces are easily made to indicate what in the Morse alphabet are shown by dots, spaces, and dashes.In this way the Morse alphabet may be telegraphed as easily as by an electrized wire. Indeed, ungodly parties have before now, at church, telegraphed across the room without awakening suspicion, by a mere movement of the eyelids.
It is reported that during the seige of Paris (1870-1), messages were telegraphed therefrom twenty and thirty miles, by the reflection of calcium lights..
The Mance Heliograph is easily operated by one man, and as it weighs but about seven pounds, the operator can readily carry it and the tripod on which it rests.
During the Jowaki Afridi expedition sent out by the British-Indian government (1877-8), the heliograph was first fairly tested in war.
THE HELIOSTAT, “is said to be the first instrument for mirror telegraphy used in war [which war is not explicitly indicated, but likely the US Civil War]. The mirror receives and reflects the sun’s rays, and a clockwork attachment keeps the mirror position to receive the direct sunbeams,which in Nevada, U.S., are said to be so bright as to be hurtful to the eye at a distance of forty miles. Behind the mirror, in the very center, some of the quicksilver is removed, leaving a very small, round, clear space in the glass, through which the operator looks and may watch the reflection from the next station.
THE HELIOTROPE reflects the rays by mirrors but has no clockwork.
Source: Plum, William Rattle, 1845-1927. The military telegraph during the Civil War in the United States, with an exposition of ancient and modern means of communication, and of the federal and Confederate cipher systems; also a running account of the war between the states. Microform. PUBLISHER Chicago : Jansen, McClurg & Co.,1882. PHYSDESC 2 v. : ill., port., maps, facsim. SERIES 1) Microbook library of American civilization; LAC 22395.
The 17 th century app store: Schott’s Organum Mathematicum
From Bradley O’Neill
[This machine was essentially an encyclopedia for the various mathematical tasks any 17 th century ‘learned gentlemen’ might face. The bone tablets mentioned herein can be thought of as ‘applications’ in the contemporary sense. Each tablet was a long strip swathed with specific calculation rules and tables for specific areas of learning. All of the tablets can be catalogued, retrieved, and cross-referenced from within a large slanted dais.. To my knowledge, this device was one of the first western efforts to collect disparate and specific mathematical applications together in one body.]
Built by Gaspard Schott, Rome, 1666. Based on John Napier’s multiplying rulers (aka Napier’s Bones) of the previous century, the Organum Mathematicum was “a large box in which are stored ten different sets of bone-like tablets for performing a variety of different tasks.” There were tablets used for:
ARITHMETIC: a standard set of Napier’s bones together with
Similar Books
