Medford Clock & Barometer

Contra Barometers

Huyghens mercury-kontrabarometers continiously measure the changes in air pressure. To estimate forecasts, one has to set the index on the glass tube to the actual mercury level. The tendancy of the atmospheric airpressure and the amount of change make a reliable forecast possible.

Christiaan Huyghens was a Dutch scientist who lived in the seventeenth century (1608-1647). He is known for several inventions and discoverys, all in some way related to shipping.

He solved one of the major problems that the Toricelli weather instrument showed: the degree of readability. He did this by placing a "multiplicator" onto the mercury tube. In the now U-shaped instrument couloured alcohol was filled onto the mercury surface. All changes in the mercury column where multiplied with a factor ten, and transferred to the surface of the couloured alcohol. The scale of the Toricelli became tenfold enlarged, and due to the couloured fluid, accurate and even from a distance to read.   

Models:currently in stock

Pointing to the item with your cursor will display model number.

K1005   K1010   K035   K216   K445   K367   K368   K369   K109

Click for a complete listing of all types of barometers

Medford Clock Shop, 3 Union Street, Medford, NJ 08055 USA
Phone: (609) 953-0014, Fax (609) 953-0411
Copyright 1999 - 2004 Medford Clock Shop. All rights reserved.