Extracted from the 1870 Queen catalog:
The
Educational Microscope
This is believed to be
the best low priced Microscope ever of offered to the
public, and it may safely be relied upon as capable
of performing all the work required by the young
student in any department of microscopical science.
It is not of course expected that it will bear
comparison with Microscopes of many times its cost,
but it is infinitely superior to the best Microscope
ever constructed on the old (non-achromatic) plan.
The simplicity of its construction, and the facility
with which all those adjustments may be made that are
required for the purposes it is intended to fulfill,
constitute with its low price, a great recommendation
to those who value a microscope rather as a means of
interesting recreation for themselves, or of
cultivating a taste for the study of nature, and a
habit of correct observation in the young, than as an
instrument of scientific research.