English Drum Microscope c. 1850

Large Improved Compound Microscope

English Drum Microscope c. 1850

English Drum Microscope c. 1850

This drum type microscope comes with a complete set of accessories that include six numbered objectives, another objective with Lieberkuhn reflector, a brass cell with a glass bottom for wet preparations, a hand magnifier, a brass talc box, a live box, a stage forceps, a hand forceps, a glass tube, a stage condenser, ivory and glass stage inserts, and a group of six sliders with each containing multiple specimens. There is a draw in the case that holds the original instruction sheet, which is reproduced below.

These drum microscopes, which are based on an 18th century design by Benjamin Martin, are relatively common. They date from the early to mid 19th century. The optics are non achromatic. Some are signed by a retailer, while others are unsigned. Most likely these were made for the trade and not necessarily by the firm identified by the signature. Versions were produced with and without the rack and pinion focusing adjustment.

drum microscope engraving

English Drum Microscope c. 1850

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