Has one coil forming a vertical loop. There is a screw terminal at the zenith possible for suspending a magnetic pointer. In the centre is a +/- 90 degree dial on the horizontal wooden shelf. All are mounted on an brass pedestal with ebonite base…
Has 3 interwound coils forming a vertical loop in the centre of which lies a magnetic pointer and dial on a circular horizontal wooden table. All are mounted on an ebonite pedestal with three brass adjustable feet. Six terminals are joined in pairs…
A scale expansion unit for the Grubb Parson Spectrophotometer. 3 dials, 2 ranging from 1 to 10 and the other from 1 to 5 in single divisions. 2 cables. In cardboard box with an assortment of screws, washers and cogs. On unit in white lettering "Grubb…
Clear plastic box with black metal trim. Inside can be seen the workings including two mirrors. On side there is three controls, one with a single unit scale from 0 to 10; fine to coarse. Three sockets, labelled as A.C. Mains, Ext. Recorder, D.B.…
