Today I updated the barometer calibration and accuracy analysis with data from September 2016.  I apologize for the delay in providing this data, I've been sick with a cold.

A link has been added to the site to the IMAPP website.  IMAPP was formed by a group of meteorological artifact collectors to create a central catalog of weather collections, large and small, around the world.  Collectors are encouraged to register their artifacts to promote their preservation and to document the history of meteorology.  The link to the IMAPP website may be found on the home page or here.

Today I added two more aneroid barometers to the instrument collection section of the website.  One is a Japanese OTA Keiki Seisakusho marine barometer.  It is very massive but unfortunately is not working yet.  I found it at a relatively low cost and am still working on repairing it.  The other is a small barometer by the Swift Instrument Company in the USA.

I also added two psychrometric calculators to the instrument collection section.  One is a large US military CP-165A/UM calculator, the other is a UK Met Office Humidity Slide Rule.  I also added text for the other psychrometric calculators on the site, previously there were only photos.  Psychrometric calculators may be found in the hygrometer section of the instrument collection.