NavList:

   

Reply

On 8 Jul 2008 at 11:21, George Huxtable wrote:

> In the meantime, I wonder whether the text provided any more information
> about that "pocket globe", a term that's unfamiliar to me. Does the text say
> whether that was a balance-wheel and spring device, as had recently been
> invented by Huyghens and Hooke (separately)? Did it have a minute-hand?

It seems that the pocket globe was just a small globe with a case that opened up
reveal the stars from a geocentric point of view. From the website:

http://www.maphist.nl/ct/ct_11.html#111krogt

"Until recently, the only known report on a pocket-globy by Abraham van Ceulen was
an advertisement in the "Amsterdamse Couranto of April 20, 1697. The probability was
put forward, that van Ceulen's pocket-globe was a re-edition of a small anonymous
globe, ascribed to Blaeu (note 7). But, when the Amsterdams Historisch Museum
acquired a copy of van Ceulen's pocket-globe, it appears to be a complete new
engraved work. The engraving is done by Gerrit Drogenham. For the celestial globe
the Blaeu 13.5 cm globe of 1606 was used as example. Because it is copied mirror-
reversed, the result is the astronomically correct geocentric projection of the
stars. The map on the terrestrial globe is identical to the mentioned anonymous
globe, but has more toponyms on it."

Ken Muldrew.

--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply