io -a $ Ne À A Ara aT, ? -+ viz Jiang ire Senn! a.na si ; ee 1 OL ee meta ea oe + nee | Courtesy of Comte A. St. Périer. Fig. 8. Sir A. Geikie, Class Book of Topo- graphical and Geographical Surveying (H.M. Stationery Office, 1923); Ministry of Information, 1917-8. Author of Advertising: Its Principles, Practice