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.