In case of an aneroid barometer with a spiral, there is an adjusting screw on the back. This screw can loosen or increase tension of the spiral.First you need to know the atmospheric pressure in your area, which can be found on meteorological sites. For example: 1005 mbar
(hPa):
change. This equals a rating of 753.8mm. There is an easy conversion method between the two, hPa
/1.333= mm AND mm *1.333= hPa.
(simplified but still very accurate)
Then
just adjust the screw to the right atmospheric pressure on the scale of the barometer, the arrow will be calibrated. (in fact you set the pressure of the vacuum inside the barometer.)
Now every change in pressure will be pointed out by the arrow correctly.
Hans Lufft died in 1584.
Hans Lufft was born in 1495.
Peter Lufft has written: 'Der Maler Gerd Burtchen' -- subject(s): Artists, Biography 'Kurt Edzard'
Hermann A. L. Lufft has written: 'Ostpreussen im Sturm der Jahrhunderte' -- subject(s): History
Just as a guess, they're probably inches of mercury. Standard air pressure is set at 29.92 inches of mercury.
I inherited an antique tea set from my Grandma.
You can find antique chees knife sets on this site: http://www.worthpoint.com/worthopedia/antique-knife-set-brusletto-geilo-old-knife-set. They are gorgeous!
You may take photos of the patio set and take them to any antique dealer to request information. If you do not have a local antique dealer you may do a search on the manufacturer of the patio set to determine if it is indeed and antique. General rule of thumb on antiques are that in order to be classified as an antique it should be approximately 100 years old.
The best way to find out how much your antique crystal decanter set is worth, is by taking it to your nearest local antique dealer. They should be able to tell you how much it is worth and other information about the set.
No Lego set will be antique for a while. They were only starting to become available in 1949; And an antique is at least 100 years old. And please do remember, just because something is vintage or antique never means that they are exclusively valuable because of that!
silver service set from 1956 will be considered as collectibles. It is not old enough and not rare enough to qualify as antique.
Air pressure is measured with a barometer.