Liznar (12), after an elaborate allowance for the disturbing effects of moonlight from the observations in 1882-1883 at Bossekop, Fort Rae and Jan Mayen.
O° 50' at Bossekop (16) in 1838-1839, and o° 7' at Treurenberg (17) (79° 55' N.
Amongst the best-known theodolite determinations of height are those made at Bossekop in Norway by the French Expedition of 1838-1839 (16) and the Norwegian Expedition of 1882-1883, and those made in the latter year by the Swedes at Cape Thorsden and the Danes at Godthaab.
At Bossekop and Cape Thorsden there were a considerable proportion of negative or impossible parallaxes.
(about 141 m.) at Bossekop (Bravais).