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Telescope (Refractor: Galilean)
Pocket telescope of Galilean type.
Telescope (Refractor: Galilean)
Pocket telescope of Galilean type.
Accession Number
BCF 9011
Location
MUSEUM
Dimensions
Classification
Scientific Instruments
Artist
Date Created
18th century
Indepth information
Full History
Pocket  telescope  of  Galilean  type.   The  body  of  the  telescope  is  composed  of  pasteboard  covered  with green - stained  fish - skin,  with  the  objective  lens  retained  by  a  wood,  brass  and  (?)  silver  mount.   The eyepiece  is  also  of  pasteboard  and  its  lens  ( now  absent )  was  similarly  held  in  place  by  a  wood, brass and  (?)  silver mount.

Length  of  pasteboard  tube  ( including  silver  mounts )  comprising  body  :  48 mm.
   
External  diameter  of  pasteboard  body  :  40 mm.

Length  of  eyepiece  :  46 mm.

External  diameter  of  pasteboard  tube  of  eyepiece  :  35 mm.

Diameter  of  objective lens  :  37 mm.


Surviving with  the  telescope  is  its  cylindrical,  shagreen - covered  wooden  case,  although  this  lacks  its  top  and  its  bottom.   Its  height  ( as  preserved )  is  65 mm  and  its  external  diameter  is  50 mm.  
References
7 in: Elizabeth Hall, Sue Lane, Christine Thompson. ‘Catalogue of Scientific Instruments from Burton Constable Hall’, 1991.
“Record of all the material which was in the collection in 1991”