Launching of the s 'Oceanic', Belfast, January 1899.

One of twenty four electrical radiometers to illustrate Sir W. Crookes' researches on the electric discharge in high vacua. (Originally twenty six but Nos. 61 and 45A (listed as 45 Pt1) broken and disposed of in 1956 and 1993.)

'Wheelok' vehicle wheel clamp, 1999.

Precision sound level meter, 1960-1979.

Wynne 'Infallible' Hunter exposure meter, c 1927.

Precision integrating sound level meter, 1975-1979.

Meteor Crater

Moldacot pocket sewing machine, 1885-1886.

Moldacot pocket sewing machine, 1885-1886.

Moldacot pocket sewing machine, 1885-1886.

Camera and hood for photographing 'phone-call meters, c 1965.

Camera and hood for photographing 'phone-call meters, c 1965.