|Object ID #||1972.085.001|
|Title||Holosteric Marine Barometer|
|Lexicon category||5: T&E For Science & Technology|
|Year Range from||1860|
|Place of Origin||France?|
|Description||Holosteric marine barometer. This round barometer is made of brass, glass, and blued steel. It has a thick pivoting hanging ring, also in brass, for hanging it perpendicularly for observation purposes. There is a gold-tone brass pointer hand which matches up with a word scale of "STORMY Much Rain Rain CHANGE Fair Set Fair VERY DRY". There is a blued-steel pointer hand for the barometric scale. Its distal end is crescent-shaped. The scale is calibrated from 28 to 31. There are two thermometers present. One is a Reaumur centigrade one with a red mercury bulb. The other is a Fahrenheit one with a silver-coloured mercury bulb. Both of the glass thermometers have curving stems and spherical bulbs. They are identified and calibrated by the manufacturer in black printing, and they are wired to the scale ring. The barometer has a flat, glass face, which allows one to view the central chamber. There is a brass, circular, knurled knob for moving the brass pointer for the word scale. There is an impressed and encircled "PHB" and "11" or "N" maker's mark on the back.|
|Makers mark||Impress-stamped in the back of the metal housing with a circle with PHB and what now looks like an "11" but that is likely a faint or badly-stamped "N"?|
Manufactured with the "PNHB" or "PHBN" trademark. Messrs. Pertius, Hulot, and Paul Naudet were the founders of a French instrument makers firm (Naudet & Cie) in Paris (established in 1860). They apparently made barometers for the British market. It has been suggested that "PNHB" also became known as a short form for "Paul Naudet Holosteric Barometer".
Owned by someone in the Owen family (related to Admiral Wm. Fitzwilliam Owen?), and was passed down to a descendant, Jean Maughan of Owen Sound, Grey County. Ms. Maughan died in 1950. Her niece, who inherited it next, was Beatrice Cowell (neé Kilbourne), of Owen Sound, wife of Norman M. Cowell.
|Collection||Transportation, Water: Accessory Collection|
|Dimensions||D-5.6 Dia-21 cm|
Owen, Captain William Fitzwilliam
|Function||Instrument manufactured at a factory and intended to be hung on the wall. The term "holosteric" means that there is no liquid in it.|