Scientific Instruments

This is one of the very first batch of standard barographs produced by Richard Frères of Paris.

Induction coils used to produce high-voltage pulses from a low-voltage direct current, are often called Ruhmkorff coils although studied by Michael Faraday in the 1830s

This lacquered brass and mahogany Hawksbee-type double valve vacuum pump is signed to the recessed silvered plate Ladd, Penton Place, Walworth.

Like many scientists and eminent thinkers of the time, Isaac Newton was also a devout Christian who thought deeply about religious matters, as a manuscript sold at auction in New York reveals.

A lucernal microscope is a rare survivor.

The 40 trays of British butterflies in this handsome mahogany four-section cabinet by JJ Hill & Son of London were collected by Geoffrey Alfred Cole.

Interest in wireless telegraphy, that was piqued when Guglielmo Marconi successfully sent a message from Poldhu, Cornwall to St John’s, Newfoundland in 1910, prompted many amateurs to build and develop their own sets based on the ‘Coherer’ principle for sending and receiving Morse code.

The HMV 900 was one of first television receivers designed by the Marconi-EMI Television Company, the firm that also provided the technology for Britain’s first television service.

The Harrison semi-automatic pedestal knitting machine was designed c.1900 for producing rib socks.

A telephone exchange removed from Buckingham Palace during refurbishment 25 years ago sold in west London for £3000.

This brass cased mining aneroid pocket barometer altimeter, c.1885, was almost certainly a one-off order or commission.

De Baecque & Associés will be selling this monumental astronomical clock standing 9ft 11in (3m) high on June 30.

The Oak Interior sale at Bishop & Miller in Stowmarket on June 1-2 includes this ‘important and exceptional’ Edward IV bronze measure.

Converse Auctions in Pennsylvania will be offering the clock collection of Willis R Michael (1894-1969) in its online auction on May 19.

This rare US patent model, offered for sale by German ‘technical antiques’ specialist Auction Team Breker (21.8% buyer’s premium), aimed to change the way messages were passed via the telegraph in the mid 19th century.

Thousands of items are available to buy from dealers online. Here we pick out one that caught our eye this week.

The slide rule shown here belonged to Dhunjeebhoy Rustomjee, who came from a fine line of Indian master ship builders in ancestry.

This instrument dates from the founding days of one of the world’s most significant aerospace manufacturers: Short Brothers

The Paris firm of Roullet & Decamps was famous for automata, walking and moving dolls and toys.

Jason Clarke Antiques has for sale at £8500 this unusually large 9in diameter, c.1770, universal equinoctial ring dial by Dollond of London