Record

Reference numberMOB/058
LevelItem
TitleMagnetic surface model by Ferdinand Engel
ArtistEngel, Ferdinand
Date1840-1845
DescriptionPlaster model of a three-dimensional surface intended to represent the seasonal changes of Philadelphia's magnetic fields. Printed inscription on model side: 'Model of the magnetic surface presented in the discussion Part II of the magnetic observations made at the Girard College Philadelphia between 1840 and 1845, by Prof. A.D. Bache. Const. and modeled by Ferdinand Engel, Washington, D.C. 1862.' The observations which this model records are described in a 36-page pamphlet published by the Smithsonian Institution in 1863.
Extent1 instrument
FormatScientific Instrument
MaterialsPlaster
NotesOn loan to the Science Museum, early 20th century- 2019
Access statusOpen
ProvenanceExact provenance unknown, however, evidence that the Royal Society was in contact with Alexander Dallas Bache on his terrestrial magnetism research is present in the Society's volumes of correspondence on the same [MS/119/1/99].

Likely a copy of the model made for the Smithsonian Institution, which published Bache's written account of his magnetic observations in 1859. [Alexander Dallas Bache, "Discussion of Magnetic and Meteorological Observations Made at the Girard College Observatory, Philadelphia, from 1840 to 1845," Smithsonian Institution Contributions to Knowledge].
URL descriptionDigital version available on The Royal Society Picture Library
URLhttps://pictures.royalsociety.org/image-rs-18187
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