Extracted from
Microscopy. The construction, theory, and use for
the Microscope by E. J. Spitta, 1907
Messrs. Watson & Sons
have recently introduced a model they call their
High-power Portable Microscope, which meets the special
want of those who require an exceptionally strong
instrument and one that can be employed when using high
powers for really critical work. This is an ideal
microscope, the makers say, for those who have to
travel abroad, up-country perhaps, where travelling is
heavy and the baggage may receive some rough usage,
sucli as would imperil the safety of an instrument
unless specially constructed for the purpose. It is
shown set up for use in Fig. 191 and closed in
192, the case measuring only 11 3/4 x 7 2/8 x4 1/8 in.,
and the total weight not exceeding 8 Ib. 13 oz.
Lightness and rigidity such as to obtain a really
useful and efficient instrument seem to have been the
aim of the makers. The stage is of ebonite and measures
3 1/2 in. square. Substage condenser, with means of
adjustment.