The microscope is
constructed entirely of brass with the main body having
a black enameled surface finish. The original
lacquered brass B&L objective is divisible and is
marked 8-16. Depending on the setting of the draw-tube
and the lenses used with the objective, this microscope
gives magnifications in the range 60-250. With the
draw-tube fully extended as shown in the photos, the
microscope measures abou 8.75-inches tall in the
inclined position. The main focus is by push tube. The
fine focus is accomplished by turning the knurled ring
of the outer tube. The mirror is single sided with a
concave glass; it can be mounted on an adjustable arm
under the stage for conventional use or above the stage
for use with opaque objects. The instrument collapses
to a small size by pushing in the tubes and folding the
legs. The microscope is is stored in a plush lined
fabric-covered case measuring 5 1/4 x 2 x 2 3/4 inches and bearing the B&L logo on the
cover.
The following was extracted from: Transactions of the American Microscopical Society, V16, pp 193-194.
A NEW POCKET MICROSCOPE
A great many American manufacturers produce miniature models which are duplicates of their standard products and which can be used by young folks. One of our largest optical plants has seemingly done a similar thing in producing an extremely small microscope which when folded can be placed in a leather case pocket size. But this microscope, miniature though it is in size, has adjustments and magnifications equal to many standard models. The construction allows telescoping of the draw tube and the use of one or both elements of the divisible objective in such manner as to give a wide range of magnifications up to 250x. With these magnifications it can be used in examining a great variety of objects, transparent or opaque, in the laboratory or especially in field work in botany, entomology, mineralogy and general nature study. The magnification is sufficient for clinical examinations, including blood counting, and due to its portability, the instrument may be used at the bedside of the patient. As mentioned before, in adjustments and operation the pocket microscope resembles the standard models. It is fitted with coarse and fine adjustments which work in easy fashion. The stage is provided with two spring clips which hold the specimen; and the mirror, adjusting in two planes, serves in its regular position under the stage to illuminate trans parent specimens. When detached from the mirror bar, it can be placed on a pin at the side of the arm to illuminate opaque specimens. The instrument is supported by a tripod, the three legs of which fold together and swing back parallel with the tubes and ready to place in the leather covered pocket case, which measures 5 x 2 1/4 x 2 3/4 inches. The microscope weighs 13 oz. and is finished in smooth, durable black.. The eyepiece and divisible objective are of high quality and the instrument in every particular is made to the Bausch & Lomb standard. Already the demand has been surprisingly great and with the popularizing of a real microscope, the company predicts a sale beyond estimates.
