Simplex Microscope 
All classes of microscopic examination do not require an instrument of the highest magnification, 
with its consequent elaboration and high cost. There is much work where a simple instrument 
of moderate power is all that is necessary. The Simplex microscope meets this requirement. 
Where a simple microscope is required which can be readily set up and manipulated, the Simplex 
will be found a most satisfactory instrument. Although simple in design, it is made with the 
same precision of workmanship as our standard instruments. It is of moderate size, the illustration 
being approximately one-third size. 
In the No. 75, the base and the limb are a solid construction and 
of sufficient size and weight to ensure the instrument standing firmly, 
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A either in its vertical or inclined position. 
The focussing adjustment is operated by a large milled ring placed 
in a convenient position accessible to either hand. The stage measures 
| 5 3} in. X 3}1n., and is provided with stage clips for holding the object. 
| The drawtube is adjustable in length by means of which the 
| : magnifying power is changed. 
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Pty The range of magnifying powers obtainable is x35 to x200. The 
om : drawtube is engraved with lines as indicated in diagram, and the 
following table gives the magnifying powers with the drawtube set at 
these positions and with the two eyepieces. 
Drawtube set 
at position, | <6 Eyepiece. x 15 Eyepiece. 
A 35 | 120 
B 55 150 
é 75 | 200 
Intermediate magnifying powers are obtained at intermediate positions. The object glass and 
eyepieces are of the standard series, and the optical performance is, therefore, equal to that of our 
larger instruments, so that clear and distinct definition, with good field of view, is obtained. 
The instrument is contained in a strong case, which measures 9} in. X 64in. x 5tin. 
In No. 76 the limb is fitted on to a horseshoe base without stage so that the microscope can 
be place direct upon a large object or surface. The focussing adjustments and the magnifying 
powers are similar to the No. 75 as described above. 
No. 75 Simplex microscope complete, without case ... aor He oe Be fA 10" 0 
No. 76 Simplex microscope complete, with case ee sis “a ice sie He hep (33 
No. 77. Simplex microscope on horse-shoe base, without case ae 5s sie 4 4 0 
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