Title: [Categories] galton.org [By Date] [By Journal] [By Category] Type:Journal:Year:Month:Day:Volume:Number:Pages:PDF FacsimileCategory:ID: [Back] Sun signals for the use of travellers (hand heliostat). Proceedings of the Royal Geographical Society Paper Author: Galton, Francis [Bib] Inventions 1859 November 28 4 14-9 6 [Uncollected]