A Rare Scottish Compound Transitional Microscope By William Duncan, Aberdeen

A Rare Scottish Compound Transitional Microscope By William Duncan, Aberdeen

£1150.00

A rare Scottish Compound Transitional Microscope signed in script on the circular foot
Wm Duncan, Optician
92 Union St Aberdeen
According to Clifton Horne, William Duncan was working at 92 Union Street between 1842 & 1849.

Dimensions

Microscope height - 15in

Circa

1841-49

Country of manufacture

UK and Ireland

Category: Microscopy

Description

A rare Scottish Compound Transitional Microscope signed in script on the circular foot

Wm Duncan, Optician

92 Union St Aberdeen

According to Clifton William Duncan was working at  92 Union Street between 1842 & 1849.

Transitional? This term refers to a period when the style and architecture of microscopes was changing. These ‘Transitional’ stands had elements of earlier microscopes mixed with elements of later instruments. This microscope has a Jones most improved type stage arrangement but achromatic lenses. The rack now moves the limb and body tube rather than the stage a on earlier instruments. Also this instrument has full aquatic motion to the limb typical of earlier instruments. See No. 44 in Turners ‘Great age of the microscope’ for another transitional type. 

Description: 
The microscope stands on a heavy circular brass base filled with lead for stability. In the centre is a compass joint that allows the microscope to be inclined to the required angle.

At the bottom of the microscope column is a concave mirror in a gimbal on a sliding collar. Above this is the stage which is quite simple with a single clip and an articulated arm carrying a stage bullseye condenser. In the centre of the stage is a recessed step which accepts the deep live box.

At the back of the stage is the course focussing mechanism acting on a rack in the back of the column. At the top of the column is a small limb that supports the microscope bodytube. The limb has full aquatic motion with a lock to one side

The objective is a French type achromatic lens with 3 screw in cells to increase/decrease the power

The microscope is contained in an associated period mahogany case with a lock and key

Condition:
Cosmetically the microscope is in very good condition with some wear to the lacquer typical of age and use.
Mechanically everything works well.
Optically the lenses are clear though a little dusty.

Dimensions:
Microscope height – 15in 
base diameter – 4in

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GB Apsley

We have been dealing in antique scientific instruments for 20 years at fairs and on ebay. We now deal on Fleaglass on which sits our complete and ever changing stock of rare and unusual instruments. We also exhibit at the Scientific Instrument Fair run twice a year in London. Please do let us know if you're interested in items you don't see in our stock or if you are interested in selling items from your own collection.