Kern, Jacob
Contenu
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Nom
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Kern, Jacob
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Couverture temporelle
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1790-1867
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Couverture spatiale
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Aarau
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Biographie
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Makers of high precision drawing instruments and planimeters. A theodolite is also known (1). Two precision levels, based on Ertel's model, were ordered from Kern in 1865 for the exact leveling survey of Switzerland executed by Plantamour and Hirsch (2).
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Notes biographiques
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1. Perret ii, N° 53; iii, N°44; iv N° 56, 57; Phillips 27 Mlay 1981 lot 62 (proportional dividers).
2. Hirsch & PLantamour 7-9 & 16-23.
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Exposition année ; ville ; type ; récompense
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1845 Berne
1853 ; New York ; Industry all Nations
1851 London
1862
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Identifiant
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ark:/18469/mrvj