SUMMARY
The scientific work of Sir John Herschel during his visit to the Cape in 1834–38 is described. An analysis is made of Herschel's general survey of the southern sky, his reason for carrying it out and the instrumentation and techniques that he employed. Herschel's special studies of Halley's comet, the satellites of Saturn, bright nebulae and stellar photometry are discussed. Herschel's participation in the Cape scientific and social activities is described.