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Boddaert’s Obstetrical Lever with Ebony Handle

A very fine, signed example of  Boddaert’s obstetrical lever lever with checkered ebony handle . Quoting from Dr. Anthony Tizzano’s excellent site: “Boddaert’s Lever is a simple form with a minor curve and two holes near the distal end which permit the passage of a cord (lac) thus producing traction in varying directions.” The maker is E. Joris working in Belgium, last quarter of the 19th century.  Read More...

Late 19th century oil lamp with a terrestrial globe

A late 19th century oil lamp with a terrestrial globe and base decorated with a castle set in a rural scene, Circa 1885. Northern European for the French market. The countries and seas indicated on the globe are written in French.  Burner made by Kosmos-Brenner. Height: 52 cm – 20 1/2 inches. Diameter: 14.5 cm – 6 inches. Read More...

A TRAVEL MICROSCOPE by a BELGIAN MAKER, c. 1840

A TRAVEL MICROSCOPE by a BELGIAN MAKER, c. 1840   A travel microscope with two columns and stage allowing a fine focusing. The microscope screws on the mahogany case and can be easily dismounted and locked into it. The microscope bears the very rare signature of a Belgian maker “Ch. Michel Opticien à Liège”. We can date this signature around 1840 because Michel worked in this town only from 1843 and 1850.   This type of microscope, normally of French origin, very seldom bears a signature. This Read More...

Rare Miniature Terrestrial globe Lebégue Bruxelles 10 CM Diameter

Rare Miniature Terrestrial globe Lebégue Bruxelles 10 CM Diameter mounted with tripode iron foot. Very beautiful cartography and paper in good condition Read More...

Politzer’s Acumeter for Hearing Testing

Adam Politzer (1835-1920) was an Austro-Hungarian physician, who is described by some as “the father of otology”. He was a prolific inventor of medical instruments and among his most widely employed devices was the Acumeter (aka: Acoumeter), a fine example of which, by H. Reiner of Vienna, we are offering here. It  was developed to replace the ticking watch as a major measure of hearing loss. Introduced in 1877, it remained in use well into the next century. The Read More...

Terrestrial Floor Library Globe by FELK Pragua C 1860

Interesting Terrestrial Floor Library Globe by Felk Pragua C 1860 Brass méridien circle . Equatorial circle with months days and zodiacal signs Foot in blacked wood with Brass compass  Read More...

Regnier Dynamometer by Amadori in Bologna

This mid 19th century dynamometer was made by ‘Amadori of Bologna’ used to measure the human muscle force and was invented by the French Civil Engineer Edme Regnier (1751-1823). The device was popularised by Professor Edmond Desbonnet, who used to test the strongmen and professional wrestlers of their day to compare compare their results. The device facilitated the measurement of two distinct forces: Pressure force, accomplished by gripping and squeezing the double steel bow, and Traction force, achieved by pulling Read More...

P.M. Tamson Dasymeter

A P.M. Tamson Dasymeter or baroscop to measure the Buoyancy of Air or the weight of air. A small balance supporting a glass bulb and a small weight on two sides of an arm. When placed in a evacuated bell jar the glass bulb appears heavier due to its greater loss of buoyancy. The balance arises from a black painted steel stand a painted label says it was made by ‘P.M. Tamson instrumenten Den Haag’. This instrument maker was founded Read More...

Italian horn 18th century single microscope in fitted horn etui

Focusing is by turning the threaded lens holder. Condition is as seen, some past damage to the horn box in the thread and the base edges by pests (not present now). Read More...

Early 18th century ebony and bone Spike-Stand

These are early Dutch forms of the spike-stand microscope lathe-turned of bone, horn, and wood. This early and relatively rare form of the Spike-Stand microscope is more or less similar to Zahn’s depiction; the latter was probably turned of wood.  Read More...

The Arlo Patent Circular Slide Rule

The “Arlo” patent slide rule, The Hague, Holland-in good condition in original aluminium case,celluloid cursor. Read More...

C1790 ITALIAN, MINIATURE GLASS SPYGLASS GOLD MOUNTS, GOOD COND. LENS GOOD

GOOD FUNCTIONING SPYGLASS WITH ITS LEATHER CASE. CLOSES WITH HEALTHY CLICK , CASE NOT QUITE FLUSH WHEN CLOSED ,NOTHING BROKEN , LENS SPYGLASS EXCELLENT Read More...