|
Date: |
|
Description: | J.B. Dancer Optician 13 Cross street Manchester. (Engraved on a makers brass trade plate). Tangent Galvanometer Fine coil Turns 400 Res 30.6 w Mean radius 15.2 cm 10 layers of 2[pi]..../r =165.4 breadth 1.8 depth 1.3 G= 1...5.4 K=.0...97 amp. p 45 [degrees] Thick coil Turns 16 Mean radius 16.09 Resistance .09 w G- 6.247 K= .25 ampo. p 45 [degrees] (written on a linen tag, removed). MADE BY DUNCAN CAMP[BELL] 96 St Vincent Street [Glasgow] (Printed on the same linen tag). N.B. There are also two paper labels stuck to the base of the instrument which probably have similar information but are largely illegible. DES JOULE,James,Prescott. circa 1843 Broom Hill near Manchester, Lancashire, England MANU John B. Dancer. 1847 13, Cross Street, Manchester, Lancashire, England. DES after SCHWEIGGER,Johann,Salomo,Christoph. 1820 Halle, Germany. This was a moving magnet tangent galvanometer originally designed by Joule. It became a standard pattern used by experimentalists and students in the 19th century. It was made to Joule's specification for Kelvin. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
|
|