engraved glass Diatom mounts by Rev.
interesting slide on the left is engraved (above the
specimen)... "Diatomaceous earth",
"Lough Mourne", "Co. Antrim",
"N.E. shore"... (and below the
specimen), "Ann. Nat. His", "Feb.
1850". The initials "Wm.S." are as
normally seen, positioned in the lower left corner
of the mount, but with the addition of a small
"m". Research indicates this particular
location (Lough Mourne Deposit) is referred to in his 2
vol. work "British Diatomaceae" (see
pages here, mid-way on 2nd page). It evidently
was one of a small group of slides prepared as the
basis for his research paper published in the
"Annals of Natural history", Feb 1850
edition, and referred to in his later publication
on the British Diatomaceae.
the right, a quite unusual engraved mount bearing Rev.
Smith's signature, and dated "10 April
1851". Most of his mounts only bear his
initials "W.S." in the lower corner.