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six draw nickel silver telescope – Ross.

A good pocket telescope by ‘Ross, London’ constructed in nickel silver with a baleen covered barrel. The draws operate nice and smoothly. The telescope measures 4.75″ long when closed and 20″ fully open. Excellent condition. Damage free. Contained in original leather case. Read More...

Rare Short Form of Hannyngton’s Extended Slide Rule

Short form of Hannyngton’s Slide Rule marked ‘Designed by Major General Hannyngton’ ‘Shop Rule’ and for the maker ‘Aston & Mander 1917 Ltd Makers London’-in good clean condition in original Case  Read More...

An Example of very rare Fearnley Universal Calculator

An example of a very rare Fearnley Patent Universal calculator, marked ‘By Royal Letters Patent’-in original mahogany case. Modus operandi is not clear although the Science Museum example describes its use by the Observatory of Cambridge University. There are no moving parts or cursor-The calculator is rather grubby as shown and the surface is covered throughout with uneven varnish.   Read More...

Three draw pocket telescope with pancratic eyepiece – Braham.

This three draw brass telescope has a leather covered barrel and measures 5.5 inches long pulling out to 15″. It is signed ‘Braham, Bristol’. John Braham worked at various addresses in Bristol from 1828 – 1838. This 3 draw has a ‘hidden’ pancratic tube / eye-piece. If the user partially unscrews the eye-piece a concealed pancratic eye-piece can be accessed (fully retractable). This tube is engraved, ‘Pancratic Eye Tube’ and has various magnification engravings from 15 – 35 x. Very clean and Read More...

Seven draw telescope – Myers, London.

Signed on the flat of the eye-piece, ‘Myers, London’, the telescope measures 22″ and 4.75″ closed. It has a lens cap and a dust slider to the eye-piece. Small dent to the barrel. Read More...

three draw telescope with engraved ‘scale of minutes’.

A nickel silver three draw telescope with a dark, mahogany barrel, unsigned, but the 2nd and 3rd draw tubes engraved with a scales of small increments and ‘Scale of minutes’. It was the Scottish scientist Sir David Brewster who invented the telescope for measuring Angles and Minutes and had a joint patent with instrument maker William Harris to produce / sell such a telescopes in May 1811. Brewster’s original design of this type of telescope was engraved, ‘Scale of minutes divided Read More...

Museum Miniature surveying sextant Signed Nairne and Blunt C.1785

Rare Miniature surveying sextant constructed in lacquered brass Signed Nairne and Blunt across the T-bar . Diagonal gilet scale divided to 130 degres, vernier with fine screw adjustment , two mirrors, six shades, threaded mounting tube, with threaded wooden handle behind. Lens of mounting tube missing. Good condition. Nairne and Blunt Edward & Thomas  shop in 20 Cornhill Fronting the Royal Exchange  London in 1783.   Read More...

Universal Microscope by R & J Beck of London.

Universal Microscope by R & J Beck of London, 1867. Serial number: 4757. Circular base marked: UNIVERSAL MICROSCOPE – R & J BECK LONDON In original fitted case with brass handle: H: 33.5 cm.   Literature:  Richard Beck’s The Achromatic Microscope, 1865.    For a similar Universal Microscope by Smith, Beck & Beck see the collections of: The Science Museum, London. (Sir Henry Wellcome’s Museum Collection) Object number: A18435.  Billings Microscope Collection at Walter Reed Army Hospital, Washington DC. The Golub Collection, University of California, Berkeley. Read More...

~VERY FINE SEXTANT by GRAY and KEEN~

A very fine (as new-unused) anodized and bright brass sextant signed “Gray and Keen, Strand Canning Dock, Liverpool” with a certificate of accuracy dated May 1, 1891. Having an index arm of 9 inches with an arc circle of 10 inches, this instrument is in original, untouched condition. Although the silvered scale (runs out to 150 degrees) is oxidized-silver sulphide black, this instrument has been perfectly preserved for over 130 years. No faults, rare address. A perfect specimen. The case Read More...

~IMPORTANT, LARGE DAVIS QUADRANT in MAHOGANY~

An important Hadley-type/Davis quadrant in mahogany wood with bone scale and name plate c.1791. Made during the first year of the partnership of Gilbert, Wright & Hooke at the Navigation Warehouse, 148 Leadenhall St., London,  this instrument has many nuances not seen before or after. Having a 17 inch index arm radius and a 15 inch arc circle, it is a rare survivor in near perfect condition. The mahogany frame has a rich colour and the brass has taken on Read More...

SOLD – Large microscope and accessories – James Parkes & Son.

SOLD – A very large lacquered brass microscope by James Parkes & Son, Birmingham. It is similar in size to a Ross No 1, standing 20.5 inches high when racked down. It has a brass bound case with accessories including: Six objectives in canister by Parkes including a 1/8 correction collar, body prism, spotted lens, prism box, all in canisters, 2 x live box, 2 x tweezers, 2 x eye-pieces, glass water trough, large frog plate, erecting eye-piece in canister, Read More...

PETER & JOHN DOLLOND CUFF TYPE COMPOUND MICROSCOPE Ca. 1775

P & J DOLLOND AT ST PAULS CHURCH-YARD, LONDON W. 1766-1804 BOX 20″ INCHES HIGH. PLEASE NOTE. REF. THE GREAT AGE OF THE MICROSCOPE BY GERARD L’E TURNER. PAGE 48 PLEASE SEE A IDENTICAL DIAGRAM OF JOHN CUFF’S MICROSCOPE ONLY TURNED THE OTHER WAY? IVORY REGISTRATION NUMBER BVT2HQL9 SHIPPING BY UPS, FEDEX, ETC. FULLY TRACKED.  Contact Email:  [email protected] Read More...