antik.it/Antique-barometers/8243a-Stick-Barometer/
Code 8243a
EUR 1800.00
In stock
1759929964Code 8243a Stick BarometerEbonized wooden stick barometer with brass threads along the edges, signed Giovanni Maineri, early 19th century.
Barometer with ebonized wooden reservoir, complete with a marine bone float indicating the correct mercury level, adjusted by the setting screw underneath the reservoir.
The barometer is complete with a vernier scale for reading atmospheric pressure variations, a humidity gauge, and a mercury thermometer.
In good condition, dimensions: 8 x 6 x 100 cm – 3.1 x 2.4 x 39.4 inches.
For safety, the barometer is emptied of mercury.
Evangelista Torricelli (1608-1647), a mathematician and physicist, a disciple of Galileo, was the first, in 1643, to build a measuring instrument capable of detecting changes in pressure. Mercury was already known to the Chinese and Hindus in ancient times; it was found in Egyptian tombs dating back to around 1500 BC. From 500 BC, its use as an amalgam for other metals began. The ancient Greeks used it as a pigment for paintings, and the Romans employed it in cosmetics. According to medieval alchemists, it was the matter from which everything else was formed, and they believed that once hardened, it turned to gold. In the 18th and 19th centuries, mercury nitrate was used to remove hair from the skins used to make hats: this caused many cases of brain damage among those who made these headdresses, even leading to the coining of the phrase "mad as a hatter."
Since ancient times, humans, as farmers and navigators, have observed and attempted to predict climate change. The scientific study of atmospheric changes began in the mid-17th century, in connection with experiments aimed at demonstrating the existence of a vacuum, which ancient philosophers denied because "nature abhors a vacuum!" If you fill a long tube with water and place it upside down in a bucket of water, the column of liquid will descend until its weight is counterbalanced by the pressure of the air on the surface of the water in the bucket: at a certain point, there will be a vacuum at the upper, closed end of the tube.
FAQ
Do you provide an authenticity certificate/expertise?
Of course! The legislative decree n. 42/2004 stipulates that who sells works of art or historical and archaeological items has the obligation to deliver to the purchaser the documents attesting to the authenticity of the object, or at least to submit the documents relating to the probable attribution and origin. Antik Arte & Scienza provides an expertise (as warranty) that contains a description, period and assignment or the author, if known, of the item.
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Secure payments by PayPal, credit card or bank transfer.
What are the shipping terms and the delivery schedule?
Shipping by DHL or UPS is free (but if we are shipping to a country non-EU remember that any taxes and customs duties are on your expense), and items will be sent just after receiving of payment.
Italy: delivering on the average in 24 h.
Europe: delivering on the average in 2/3 weekdays.
Other countries: delivering on the average in 5 weekdays; custom duties charged to the buyer.
Is shipping insured?
Of course! Free insurance by Lloyd's London that covers almost all destinations.
If I change my mind, can I return the item?
Of course! (see our general terms for more information).
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Antique barometers
Code 8243a Stick Barometer
Antik Arte & Scienza sas di Daniela Giorgi - via S. Giovanni sul Muro 10 20121 Milan (MI) Italy - +39 0286461448 - info@antik.it - www.antik.it - Monday-Saturday: 10am-7pm
