Wet gas meter, 3 light capacity, 368mm height x 300mm width x 275mm depth, in steel case painted green with gold lining, three areas glazed to reveal mechanism, by W H Moran, Cologne, serial no. 10202, 1861, with three dials measuring in 10s, 100s and 1000s of cubic feet, with hinged cover for the dials and three detachable metal covers to the glazed areas. Wet gas meter, in steel case, with hinged dials cover and detachable metal covers
Metal water-jet filter pump (no.15220), sectioned, in two pieces, by E. Leybold's Nachfolger, Cologne, Germany, 1924-1934 Metal water-jet filter pump (no.15220) 1924-1934
Model, scale 1:5, Pelton wheel turbine, by Peter Koch, Victor Gelpke and Paul Kagel, Germany, 1907-1917, represents an installation by Messrs. Amme, Giesecke and Konegen of Brunswick, invented by Lester Allan Pelton. Part sectioned to show Pelton wheel. Pelton Wheel Turbine 1907-1917
Condenser marked "No 615 E Leybold's Nachfolger AG Koln" used in work on electric dipole moments, 1930s Condenser marked "No 615 E Leybold's Nachfolger AG Koln" used in work on electric dipole moments 1930-1939
Folding clinometer rule with case, by D. Mauch, Cologne, Germany, 1855-1865 Folding Clinometer Rule, 1855-1865 1855-1865
Boxed tube of "Balsalyt", by Dr. Madaus and Co. Cologne Boxed tube of "Balsalyt", by Dr. Madaus and Co. Cologne
Lens barrel with iris diaphragm calibrated 0-5 with 7 lens components 15/25/35/45/55/65/75. With 11 combinations for normal and wide angle use. Lens No 4629. Janssen combination lens
Clinometer rule and compass with case, Glover's patent of 1839, by D. Mauch, late 19th century to early 20th century Clinometer rule & compass, 1885-1905 1885-1905
Stollwerck's 'Chocolate Phonograph' by Stollwerck Bros., Cologne, Germany, with wax disc, song 'British Grenadiers', 1903. Fitted with later cardboard disc and foam packing. Stollwerck chocolate disc phonograph, 1903 1903
model, scale 1:5, Mannesmann's tube rolling mill, plus components (see 2 stroke nos). 1:5 Scale Model Mannesmann's Tube Rolling Mill 1912
Five specimens illustrating the Mannesmann process of solid drawing steel tubes. Five specimens illustrating the Mannesmann process of solid drawing steel tubes
Double wire-loop oscillograph for studying the waveforms of electrical oscillations, by Leybold, c.1960 Double wire-loop oscillograph for studying the waveforms of electrical oscillations 1950-1974