Year/Period |
1900-1930 |
Maker |
BUSCH |
Country |
Germany |
Signature |
Busch |
Category |
Other optical equipment |
Subcategory |
Magnifying glasses |
Size of the instrument (h x w x d) |
2.8 × 4.5 × 2.5 cm (folded); ø lens 2.5 cm |
Donated by |
R. Ketting, Vlaardingen, The Netherlands |
Inventory number |
SM 509 |
Metal folding pocket magnifier with an 8× magnification.
Busch logo on the front; INS: engraved on the back.
The magnifying glass has been donated to the foundation by Mr. R. Ketting and comes from the legacy of his uncle who worked at TNO Utrecht.
Refractometers/saccharimeters
BLEEKER
1945-1965
Porro prism binocular 6×30
BLEEKER
ca. 1953
Monochromator with adjustable filter
ZEISS
1950-1965
Hemoglobin meter
REICHERT
1870-1880