The Royal Van Heurck model with binocular and monocular tubes
and continental base. c.1897
Note that the top plate
of the stage is capable of full rotation
An advertisement
from 1892
Although, at the
time this microscope was manufactured, the
designation of the name "Royal" to describe this
model was not yet in use, this microscope has all
the features that were later incorporated in the
Royal model. This instrument could also be
considered an example of the Edinburgh D model
having the addition of a double draw-tube with
the lower tube having a rack and pinion
adjustment. This particular instrument came furnished
with both binocular and monocular tubes.
The Watson Van
Heurck type instruments with the continental base
are far less common than those with the English
tripod base. On the right is an illustration of a
later example of the Royal model with the English
base.