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  Mining Dip Needle Compass.JPG - MINING DIP NEEDLE COMPASS - Brass and glass mining dip needle, 3 1/4 in. dia., 4 in. dia. handle with brass chain and ferrous needle stop, marked SHORT & MASON LONDON with M over S mark and TYCOS, includes original "Descriptive Leaflet No. 11" for "The Mining Dip Needle" from Short & Mason (Thomas Short and James Mason became partners and started their precision instrument business in London in 1875.  In the early 1900s, Short & Mason was acquired by the Taylor Brothers Company originally formed in 1853 in Rochester, NY as an early manufacturer of high quality thermometers.   It was at this time the brothers renamed their company to Taylor Instrument Companies, which spawned the Tycos trademark derived from T and Y of Taylor and C, O and S of Companies.  The newly named company developed one of the first hand aneroid sphygmomanometers.  Sometime before 1920, the company added the Tycos name to their scientific instruments as marked on this dip needle.  The mining dip needle is used to locate the presence of iron ore.  Simply, the dip needle should be suspended vertically by the handle in the magnetic meridian or north south line as close to the ground as possible.  If iron is present, the magnetised needle will dip toward the deposit away from the normal magnetic declination at that site.)  
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Mining Dip Needle Compass | MINING DIP NEEDLE COMPASS - Brass and glass mining dip needle, 3 1/4 in. dia., 4 in. dia. handle with brass chain and ferrous needle stop, marked SHORT & MASON LONDON with M over S mark and TYCOS, includes original "Descriptive Leaflet No. 11" for "The Mining Dip Needle" from Short & Mason (Thomas Short and James Mason became partners and started their precision instrument business in London in 1875. In the early 1900s, Short & Mason was acquired by the Taylor Brothers Company originally formed in 1853 in Rochester, NY as an early manufacturer of high quality thermometers. It was at this time the brothers renamed their company to Taylor Instrument Companies, which spawned the Tycos trademark derived from T and Y of Taylor and C, O and S of Companies. The newly named company developed one of the first hand aneroid sphygmomanometers. Sometime before 1920, the company added the Tycos name to their scientific instruments as marked on this dip needle. The mining dip needle is used to locate the presence of iron ore. Simply, the dip needle should be suspended vertically by the handle in the magnetic meridian or north south line as close to the ground as possible. If iron is present, the magnetised needle will dip toward the deposit away from the normal magnetic declination at that site.) Download Original Image
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