Lot #82: Antique Compensated Pocket Barometer by "Hearn & Harrison, MONTREAL".

Company History: Charles Hearn, an optician and mathematical instrument-maker, established his business in Montreal around 1860-61. After his death, his wife, Susan Watson Hearn, took over and later married Thomas Harrison, leading to the formation of Hearn & Harrison. Instrument Makers: The company was known for producing a variety of scientific instruments, including barometers, thermometers, and surveying instruments. Their instruments were used by various institutions and individuals, including the government. Barometer Characteristics: Antique barometers by Hearn & Harrison, especially the pocket versions, are valued for their design and craftsmanship. Some were "compensated" pocket barometers, meaning they were designed to provide accurate pressure readings despite changes in temperature. The brass casing and dial often feature beautiful lacquer work and detailing. Collector's Items: These barometers are highly collectible, with factors like rarity, maker, condition, and historical significance impacting their value. Pickup category timeslot {A}