June 28 by Walter Otto Koenig

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28-JUN-2010	Walter O. Koenig

June 28

Holosteric Barometer

My wife gave this beautiful late 19th Century Ships Barometer to me as an early birthday present. (My birthday is in October!)
It was made in France for the Dutch Market.
I'm a bit puzzled by the scale going from 71 to 81. Does anybody know about this kind of measurement?
I am only familiar with inches and millibar scales.

Update: Vatorman solved this one, the scale in cm.

Nikon D300 ,Tamron SP AF 180mm f/3.5 Di Macro
1/6s f/11.0 at 180.0mm iso200 full exif

other sizes: small medium original auto

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Graeme		19-Jul-2010 10:06
What a lovely early birthday present, Walter.V

Carol Rollins		30-Jun-2010 04:38
A beautiful shot of your marvelous new "toy." ~

Lamar Nix		29-Jun-2010 14:06
Nice present, I'd say! The brass shows up well in the image. As to scale: 1 atmosphere = 1.013E6 dynes/cmsq = 76 cm Hg . So I think your scale reads the latter, centimeters of mercury. V

Wolfgang Bluhm		29-Jun-2010 14:01
Very very neat. The scale is in centimeters of mercury. Millimeters of mercury was actually the more common unit, but this allows to drop one zero. Type the following into a Google search engine: "1000 mbar in mm Hg". It's about 750 mm Hg or 75 cm Hg. 1 mm Hg was also called 1 Torr.

pkocinski		29-Jun-2010 13:02
Someone likes you a lot to give you such a wonderful gift! Nice shot!

Colin Storey		29-Jun-2010 12:07
Wonderful gift and a great sharp shot of it. v

Guest		29-Jun-2010 11:40
amazing one walter i loved the colros , just perfect !!! well done .v

Bill Ewart Jr		29-Jun-2010 11:28
Looks like it's in perfect condition!!!!!!!!!!!!!!

LynnH		29-Jun-2010 11:15
A wonderful present! This is a lovely instrument, a treasure! V

Pierre		29-Jun-2010 10:25
Un très beau baromètre parfaitement net. (C'est effectivement des centimètres de mercure).

Ken Chambers ARPS		29-Jun-2010 07:37
Beautiful shot of a lovely piece of work. I love having a barometer in the home, I am sure that mine gives me a better forecast than the 'TV Weather' LOL A thing of beauty is a joy forever ... BV

Brian McAllister		29-Jun-2010 07:11
Excellent image! V

Guest		29-Jun-2010 06:26
Wonderful detailed shot Walter! V

globalgadabout		29-Jun-2010 06:05
excellent shot of this fascinating instrument...lighting is superb..V

Gerard Koehl		29-Jun-2010 04:30
Superbe baromètre... V

Patricia Kay		29-Jun-2010 04:26
What a beautiful gift Walter...one you will treasure...BV

Sam Rua		29-Jun-2010 02:29
Or perhaps not degrees... http://photo.meulie.net/v/various/Holosteric_barometer/DSC00001.JPG.html

Sam Rua		29-Jun-2010 02:24
Great detail and comp, Walter. A beautiful instrument. I think the lower scale is degrees Fahrenheit. Here's a link that has a similar barometer:http://www.scientificcollectables.com/page_enlarge964.htm (And happy birthday to you)

Johan Claeson		29-Jun-2010 02:21
That's a beautiful instrument, Walter! Congrats and Happy Geburtstag!

Glenn D.		29-Jun-2010 01:17
Nice detail Walter - and a Happy Birthday! (Would that be centimetres of Mg - 27.9" to 31.8"?)

Guest		29-Jun-2010 00:29
Beautiful light and excellent details, v

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