Current record mode: basic


438 of 655 records      previous / next

Early Coherer, Dover, c. 1899

Inventory Number: 72143

72143-1t 17473-19433-34674-50538-53061-55585-57633-62930-72143-72278-80963-82611-87538-88920-98899-1t 72143-2t

Date: c. 1899

Maker Details: Unknown

Inscription: "12/7/99 / nic & sil / Busy / 30 min / Foreland? / Retested / As before / 19/7/99 99M / Good tube / not very sensitive / 14/7/99 JGU" handwritten on attached folded paper label.

Size: 110 mm in overall length (excluding end wires)

Materials: Glass, copper, nickel, silver, assorted metals.

Other Given Number(s): Christie's 11.


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.

438 of 655 records      previous / next

Record mode: Basic | Medium Images | Large Images | Documents (2)