Re: [ATM] Inventor of Mangin mirror dies?

[William Lee <wjl12@comcast.net>]

In "Reflecting Telescope Optics 1" by R.N. Wilson, p. 210:  "It was  
first proposed by Mangin in 1876 for systems projecting light beams  
(searchlights)." This passage references a publication by A. Mangin,  
"Memorial de l'officier du genie", 1876, 25.(2)10, pp. 211-289.

On Nov 21, 2007, at 7:12 PM, Guy Brandenburg wrote:

> I can't find the French military officer who invented it, but those  
> searchlights were in use in the late 1800's. The device features  
> prominently in the book "Two Moons" which takes place in the 18??s  
> when Asaph Hall was discovering Deimos and Phobos.
> So, unless that Mangin was blessed with Methusalah-like longevity,  
> he probably died at LEAST 50 years ago.
> There are a number of other Mangins mentioned in the French version  
> of Wikipedia.

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