Today I added two mercury barometers to the instrument collection on the website:

1. A Fortin barometer made by James Green & Henry J Green, from around 1879 to 1885.  J Green & H J Green were partners in this period.  It is not functioning, there's no mercury in it.  See now.
2. A Fortin barometer made by W M Welch around 1949.  It also is not functioning, there is no mercury in it.  See now.

​I also revised the text for the Henry J Green mercury barometers already on the website.