De Geer (named from the remains of the mollusc Ancylus fluviatilis), which is supposed to have covered an area of about 220,000 sq.
Also materially assisted De Geer (q.v.) to carry through his memorable reform of the constitution in 1863.
The work of de Reaumur and de Geer on the bionomics and life-history of insects has been continued by numerous observers, among whom may be especially mentioned in France J.
He succeeded, with the invaluable assistance Geer (q.v.), in at last accomplishing the much-needed reform of the constitution.
This motion having been rejected, De Geer resigned, and was succeeded by Count Arvid Posse.