Working on articles on...
/Charles Mitchell, publisher of the first British press directory
/Mitchell's Press Directories, probably a more generally useful entry than one about Mitchell himself
Previously (2013!) working on... /Elizabeth Mason-Hohl
/Mary Howard (née Finch), Viscountess Andover
/Mary Ann Brooks (botanist and diarist)
Also some of the names at http://modernbluestocking.freebase.com/discuss/threads/m/0jvhtct aren't represented in Wikipedia plus there's a further list of names selected by the Royal Society at Wikipedia:WikiProject Women's History/Ada Lovelace Day 2012 https://en.wikipedia.org/wiki/Wikipedia:ADA - list of women who need articles created.
Useful sources: Chemistry Was Their Life: Pioneering British Women Chemists, 1880-1949 By Marelene F. Rayner-Canham, Geoffrey Rayner-Canham
International Women in Science: A Biographical Dictionary to 1950 By Catharine M. C. Haines