Cock, Thomas

Cocking, D., M. Rohrer, R. Thomas, J. Walker, and D. Ward. 1995. Effects of root morphology and Hg concentration in the soil on uptake by terrestrial vascular plants. Water Air Soil Pollut. 80 1113-1116. 

The technical working of massive platinum should be ascribed, however, to Thomas Cock, a brother-in-law of the platinum-refiner P. N. Johnson, rather than to Wollaston. Cock worked out the process in William Allen s laboratory at Plough Court and, at Allen s request, communicated it to Wollaston (51). According to G. Matthey, P. N. Johnson was the first to manufacture platinum on a commercial scale and the first to prepare a large and perfect sheet of the pure metal. James Lewis Howe has stated that Chabaneau s process was rediscovered by Knight and possibly also by Cock (72). 

Thomas Cock manufactured platinum by Wollaston s process, and Wollaston was associated with him for some time. In 1805, platinum crucibles could be bought for 17s. 6d. per oz., and wire... 

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