History of Science Museum: Collection Database Search

Record Details

Early Coherer, c. 1899

preview image for Early Coherer, c. 1899
Inventory Number: 17473
Object Type:
Accession Number: 2004-9/518
Brief Description: Early Coherer, relatively fragile, dated 1899. In small, narrow cylindrical glass tube with nickel-plated components, and copper connection wires exiting from each end. Structure appears to be two glass rods tied together side by side, with longer lower glass tube, and with protruding glass tip on upper glass tube. Label would indicate that filings are made of nickel and silver.
Primary Inscriptions: "267" handwritten on paper label upon glass tip. "3/8/99 / nic. & sil. / Busy 1.5 Hours / finest filings / Retested M. 115ft / Reqs hard tap / gd. hard tap / Qo M115ft T66 R4000 / No Jigger R.7000 / sigs 3" handwritten on attached folded paper label.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Glass
copper
nickel
silver
assorted metals.
Dimensions:
Height Width Depth Diameter Unit
115 60 mm

Narratives

Image with multimedia irn 35251Image with multimedia irn 35252Image with multimedia irn 35253

Permalink: http://www.mhs.ox.ac.uk/object/inv/17473