Crooke's radiometer, c 1875. William Crooke

Crookes radiometer, 1879-1888.

Crookes radiometer, 1877.

Crookes' radiometer, 1877.

Crookes' radiometer, 1877.

Crookes' radiometer, 1875.

Crookes Maltese cros tube (left) and radiometer (right), 1879-1888.

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.)

Sir William Crookes, English chemist and physicist, c 1875.

Sir William Crookes, English chemist and physicist, c 1905.

Sir William Crookes, English chemist and physicist, 1911.

Sir William Crookes, English chemist and physicist, 1911.