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Hugo Wull
Hugo Wull's "Last Winter" Speech
Published: 2017/06/25
Channel: Valkyrist ASOIAF Readings
Abby/Jimmy/Henry - Come To Life
Abby/Jimmy/Henry - Come To Life
Published: 2009/08/11
Channel: MrSpevin
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JPLEXX Vs Anthony Lee
Published: 2016/08/14
Channel: JPLEXX Channel Wrestler
Dj Bobiaan (HORNY HOUSE REMIX)
Dj Bobiaan (HORNY HOUSE REMIX)
Published: 2011/04/11
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The Fantasticks by Tom Jones& Harvey Schmid
The Fantasticks by Tom Jones& Harvey Schmid
Published: 2009/01/10
Channel: Shalishasmcintosh09
Inside The Mind of Henry Dunn
Inside The Mind of Henry Dunn
Published: 2009/07/22
Channel: LadypenelopeSurvives
Hedges Squiggle-Tasting
Hedges Squiggle-Tasting
Published: 2012/06/28
Channel: Christopher Fedosky
Dennis the Menace Reunion Interview Part 1 of 3
Dennis the Menace Reunion Interview Part 1 of 3
Published: 2011/09/30
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Blues Legends Diaporama 1/2
Blues Legends Diaporama 1/2
Published: 2010/05/14
Channel: zeepoch
SSW presents: ALL HALLOWS EVE | Live on YouTube
SSW presents: ALL HALLOWS EVE | Live on YouTube
Published: 2017/01/24
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Henry & Sully || This Is Why I
Henry & Sully || This Is Why I'm Hot
Published: 2009/11/14
Channel: MrsChloeButterfly
RIP Chris Tutt
RIP Chris Tutt
Published: 2011/11/02
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Sandy Sims and C.J. Thomas on Let
Sandy Sims and C.J. Thomas on Let's Get On The Same Page
Published: 2008/08/14
Channel: musiqinmyhead
The Single Petal of a Rose - Chris Shuttleworth
The Single Petal of a Rose - Chris Shuttleworth
Published: 2015/06/24
Channel: Second State Media
Sunburst/Jubilation
Sunburst/Jubilation
Published: 2014/05/05
Channel: jostheemoes
West Texas Blues by Charles Booker (1919, Blues piano)
West Texas Blues by Charles Booker (1919, Blues piano)
Published: 2015/05/01
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Shattered | Henry Dunn.
Shattered | Henry Dunn.
Published: 2009/08/19
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Harper
Harper's Island - Pure Love
Published: 2011/01/08
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Abby/Jimmy - Nothing But Love
Abby/Jimmy - Nothing But Love
Published: 2009/06/12
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Harpers Island-Magnificent
Harpers Island-Magnificent
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Vindicated (AU) - Official Trailer
Vindicated (AU) - Official Trailer
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Corey Harris - Take Me Back
Corey Harris - Take Me Back
Published: 2014/11/08
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Heliograph
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Sage Philips Speaks About Welterweight Wrestling iPPV 5-7-17
Sage Philips Speaks About Welterweight Wrestling iPPV 5-7-17
Published: 2017/05/03
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harper's island; what if jimmy died? (AU) // henry/abby/jimmy
Published: 2009/08/30
Channel: IMCRmy
Abby/Jimmy - Oh Gravity
Abby/Jimmy - Oh Gravity
Published: 2009/05/26
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Bret Havoc vs Dale Patricks vs Ace Perry
Bret Havoc vs Dale Patricks vs Ace Perry
Published: 2017/04/25
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Religious Debate
Religious Debate
Published: 2010/07/12
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Harper's Island - PromoPlot
Published: 2009/07/01
Channel: HarpersVids2009
John E. Bravo vs Hakim Zane vs Aiden Prince
John E. Bravo vs Hakim Zane vs Aiden Prince
Published: 2015/06/11
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Sunburst/Jubilation
Sunburst/Jubilation
Published: 2009/04/01
Channel: K Deusgeetar
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Published: 2010/02/10
Channel: 12sloana
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Published: 2010/04/22
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Man of Steel   Teaser Trailer with Russell Crowe A HD
Man of Steel Teaser Trailer with Russell Crowe A HD
Published: 2012/08/05
Channel: Abradangelina
Ernie Hawkins  •  What
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Published: 2011/04/07
Channel: bluesadvice
Kneel to the King
Kneel to the King
Published: 2012/05/21
Channel: Ryhigh91
Chloe&Cal + Trish&Henry + Abby&Jimmy - Set my heart free
Chloe&Cal + Trish&Henry + Abby&Jimmy - Set my heart free
Published: 2009/08/28
Channel: ElektraSkater
Judge Willie Lipscomb Jr. - Part II
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Published: 2007/08/20
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Published: 2012/03/05
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Virginia Tech
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Published: 2007/04/17
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Published: 2012/02/20
Channel: MrRemoomer
Harper
Harper's Island - Down
Published: 2010/07/30
Channel: xHeroGirlx
Chris Henry - Peak
Chris Henry - Peak
Published: 2016/09/27
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Published: 2013/07/03
Channel: Wendy Darling
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Published: 2009/05/14
Channel: Jimmy Nelson
Cal U Fall 2011 Undergraduate Commencement Ceremony
Cal U Fall 2011 Undergraduate Commencement Ceremony
Published: 2012/02/07
Channel: California University of Pennsylvania
my gay bro and other shit
my gay bro and other shit
Published: 2010/07/23
Channel: Brandon Miller
2012 Spring Undergraduate Commencement
2012 Spring Undergraduate Commencement
Published: 2012/08/02
Channel: California University of Pennsylvania
HARPER
HARPER'S ISLAND "Sigh"
Published: 2010/02/19
Channel: konztantlys
TESTING COLORING *Do not watch:)*
TESTING COLORING *Do not watch:)*
Published: 2009/12/11
Channel: SoCloseable
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Australian soldiers using a Mance heliograph in 1940

Sir Henry Christopher Mance,CIE (1840 – 21 April 1926), a British electrical engineer, was knighted for developing the heliograph and president of the Institution of Electrical Engineers. [1][2]

Born in Exeter, he was educated privately.

He joined the Persian Gulf Telegraph Department in 1863, and was employed on the laying of the first Persian Gulf submarine communications cable. In 1879, he was appointed electrician to the Department, which position he held throughout his working life. An inventive man, he was responsible for a number of important developments in the field of cable laying, testing and usage.

In 1869 he invented the heliograph, a wireless solar telegraph that signals by flashes of sunlight using Morse code reflected by a mirror[3]. The flashes were produced by momentarily pivoting the mirror[3]. Frustrated by Government lack of interest, he sent a number of his instruments to Lord Roberts for use during the second Afghan War, where the practical value of the invention was realised. It was subsequently adopted by military services worldwide and was still being used in World War II.

He was Vice-President of the Institution of Electrical Engineers from 1892 to 1896 and elected President in 1897. He was also a member of the Institution of Civil Engineers and the Physical Society.

He retired in 1885 but continued his interest in Electrical Engineering as Chairman of the Oxford Electric Company and board member of several other electrical companies. Practically blind for the last 10 years of his life, he learned to read Braille.

He was created a C.I.E. in 1883 and made a Knight Bachelor in 1885. [4][5]

He died in 1926. He had married Annie Sayer in 1874, and had three sons and two daughters. One son was Brigadier-General Henry Osborne Mance.

References[edit]

  1. ^ "Henry Christopher Mance". Graces Guide. Retrieved 16 July 2017. 
  2. ^ "The New President of the Institution of Electrical Engineers". The Electrical Review (999). 15 January 1897. p. 62. Retrieved 16 July 2017. 
  3. ^ a b War Office, General Staff (1911). Training Manual – Signalling, 1907 [ Reprinted, With Amendments, to 1st May, 1911]. London: His Majesty's Stationery Office. p. 64. Retrieved 16 July 2017. 
  4. ^ The India List and India Office List for 1905. p. 146. 
  5. ^ "Birthday Honours." Times [London, England] 6 June 1885: 7. The Times Digital Archive. Web. 13 June 2015

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