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ANGUS HENDERSON MICROSCOPE:

c. 1865

SIGNED: 'ANGUS HENDERSON EDINBURGH'

Serial Number: None

DESCRIPTION HISTORY OF ANGUS HENDERSON INSTRUMENTS

Angus Henderson Microscope

DESCRIPTION

Henderson This rare microscope is made of lacquered brass, with a heavily weighted uniquely shaped 'horseshoe' foot. It is of continental bar-limb construction. Coarse focus is to the tube by rack and pinion, and fine focus by screw on the continental pattern; the small center knob over the main fine-focusing knob is a modern replacement. There is a long draw tube, as shown in the third image below. The mechanical stage has separate adjustments for x and y motions. There is a moveable ledge for supporting a slide. There is a wheel of substage apertures with stops. The mirror is supported on a gimbel to the tailpiece which can swing left or right and is double jointed. The inclination joint has adjustable tension via a milled knob on the left side of the microscope. There are two objectives, one with three stacked elements, one with two. The trade card in the original case has unfortunately been covered with celophane tape. It is orange in color. Henderson

HISTORY OF ANGUS HENDERSON INSTRUMENTS

Angus Henderson advertised himself as a 'Practical Optician' in 1860 in Edinburgh. He worked at the address shown on the card from 1861-1868. As seen on his trade card he stated he 'worked for many years in the establishments of Messrs Adie & Son and Mr James Bryson.' Adie & son operated until 1857. James Bryson was an Edinburgh maker who had emigrated from Germany. In the National Museum of Scotland, are some mathematical instruments signed by Henderson, but the only microscope in that collection with his trade card in the case, contains a Nachet microscope. A Hartnack & Prazmowski microscope with Henderson's trade card was sold on Ebay in 2008. To this author's knowledge, and according to the National Museum of Scotland, no other microscope signed by Angus Henderson was known as of the time of this writing(2012).

Henderson