ANTIQUE ELECTRICAL, MEDICAL & other SCIENTIFIC INSTRUMENTS .
SCALES, WEIGHTS & MEASURES
CONTINENTAL
BUTCHERS SCALES
A magnificent set of brass double beam antique butchers weighing scales, dating from around 1900. These continental weighing scales are 1.65m high, have 2 sets of pans suspended from brass beams each with poised dolphins at the ends, mounted on a single pillar with a brass bull’s head finial at the top. The beams have screw-in balancing weights. The shaped base holds15 weights ranging from 5 grams to 5 Kilograms. The large pans and weights are all stamped with assay marks to confirm the calibration.
An
early 19th
century set of Apothecarys’ Drug
Scales, hand held by the cotton tag, in it's original case
and with a set of Drachm weights. The steel beam balance has brass
pans suspended by cotton threads and the whole instrument and
weights fit into the six inch long oak chest type case with
working catch & hinges
A
18th/19th
century set of Apothecarys’ Scales, by Avery,
in it's original case with makers trade
label on the underside of the lid and each pan embossed with
the Avery
trademark. The balance comes with a set
of Drachm weights in the oak case. The
steel beam balance has brass pans suspended by chains and the
whole instrument and weights fit into the seven inch long oak
chest type case with hinged lid and
working catch
ELECTRICAL
A pair of vintage OIL IMMERSION RESISTORS, with connectors in glass phials, used to demonstrate the temperature coefficient of resistance, by Philip Harris of Birmingham, England.
MEDICAL
A cased HAWKSLEY & SONS antique medical HAEMACYTOMETER complete with micrometer slide in a plush lined case.
The Belgrave SPHYGMOMANOMETER signed on the silvered dial Bailey & Son, 45 Oxford St. London W.1., the scale reading 20 - 300 m/m, the 2 in diameter brass case with suspension loop and inlet guard
DRAWING INSTRUMENTS
A
fine set of proportional dividers in their original blue silk
lined case. The dividers are engraved on one
side “A
G Thornton, Manchester”
with scales for LINERA
RATIOS and LINES, & on the other side
with scales PLANS and SOLIDS.
A cased set of drawing instruments comprising springbows, compasses and pens, in a black leatherette covered case,
A cased set of spring bow drawing instruments consisting a pair of dividers, a lead compass and an ink compass in a black leatherette covered case, monogrammed inside the lid with “D.R.”, the maker’s trademark?
OTHERS
A 10 in. Philips' Planisphere for latitudes 51 1/2 deg. North, shows the principle stars visible every hour for every day of the year, in original case -
Galvanometers, ammeters, pressure gauges, etc...
BOOKS
Bar-lock typewriters model 18 & 18a handbook by Bar-Lock (1925) Ltd.,
The World's Minerals (with 40 colored plates) by L.J.Spencer,
GENERAL LINKS
Scientific Instrument Making in Manchester 1790 - 1870 by Jenny Wetton - this book could be purchased from the Manchester Museum of Science and Industry +(44)161 832 2244 for about £2
Interested in Astrolabes, then follow this link to a site full of excellent information on the subject.
For information on camera lucidas & how to use them click here (please be patient as this is a large file of aprox. 1 Mb)
And an artist who uses camera lucidas click here