Determinations des Longitudes and Other Important Works by Emil Plantamour (see description) in 2 vols

63pp + plate, 88pp, 140pp, 52pp: 222pp + index + 3pl, 162pp + plate, 102pp + plate, 161pp + index + 3pl, 131pp + plate VG/none nine different works by Plantamour, with others, bound together in two volumes, strong blue buckram, a couple of small and unobstrusive stamps on preliminaries otherwise in excellent conditions throughout, with tables, diagrams, maps and illustrations. Vol.1 : Des Anomalies de la Temperature observees a Geneve, Nouvelles Experiences faites avec Le Pendule a Reversion, Observations Faites dans les Stations Astronomiques Suisses, Recherches Experimentales sur le Mouvement Simultane d'un Pendule. Vol.2 : Determination Telegraphique de la Difference de Longitude entre la Station Astronomique du Righi-Kulm et les Observatoires de Zurich et de Neuchatel (with R Wolf and A HIrsch), ditto entre des Stations Suisses (with A Hirsch), ditto entre l'Observatoise de Zurich et les Stations Astronomiques du Pfander et du Gabris (with R Wolf), ditto entre Geneve et Strasbourg executee en 1876 (with M Low), ditto entre les Observatoires de Geneve et Bogenhausen pres Munich executee en 1877 (with Col. von Orff) In French. Very heavy volumes (1.3kg + 2.6kg), requiring extra postal charges. Emil Plantamour was a Swiss astronomer and director for many years of the Geneve Observatory.