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Shown here is an engraving from the 1901 edition of The Microscope and its Revelations by Carpenter of the massive Nelson No. 1 Microscope. Features which were standard for this model which were not standard on the number 2 included:
- An even larger foot and tripod-the splay of the foot on the huge number 1 was noted in the catalog to be 11 x 9 inches (compared to 7 x 7.5 inches for the No 2).
- The limb bending away from the inclination joint was a feature unique to the No 1.
- Concentric Controls for the mechanical stage (eventually optional, and not always standard)
- Rack and pinion adjustment for stage rotation, in addition to
manual rotation
- Fine focus to the substage (eventually optional)
- Rack and pinion rotation to the substage (also standard for the No 2 until after 1895 when it was no longer offered on the No 2)
- Just like the No. 2, the No. 1 initially had round front foot pads (toe-pads) but later the front two were slotted.