Year/Period |
1950-1960 |
Maker |
BLEEKER |
Country |
The Netherlands |
Signature |
825 of R25 / NOI [in logo] |
Category |
Other optical equipment |
Subcategory |
Other |
Size of the box (h x w x d) |
12.0 × 24.3 × 14.2 cm |
Size of the instrument (h x w x d) |
h 19.0 × ø 4.1 cm |
Donated by |
P.P. de Bruijn, Zeist, the Netherlands (former owner) |
Inventory number |
SM 209 |
In wooden box.
This is the viewer of a cathetometer. It needs to be mounted on a heavy tripod.
There is a threaded eyepiece, the signature is corroded and therefore difficult to read: 825 or R25 / NOI [in logo].
A conversion lens is missing.
A cathetometer is an instrument for measuring vertical distances in cases where a scale cannot be placed very close to the points whose distance apart is desired. The instrument consists essentially of an accurately graduated scale and a horizontal telescope capable of being moved up and down a rigid vertical column.
This cathetometer has been donated to the foundation by Peter Paul de Bruijn.
Telescope
ONBEKEND/UNKNOWN
1900-1930
Magnifier
OLDELFT
ca. 1950
Achromatic magnifier 10×
BLEEKER
1950-1960
Butter refractometer after Wolney
ZEISS
ca. 1891
info@stichtinghistorischemicroscopie.nl
Visseringlaan 25
2288 ER Rijswijk
The Netherlands
RSIN: 804217361
KVK: 41182753
IBAN: NL53INGB0007728414
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