Ltd., Slade and Parkes, who discovered the rate of exchange, though of course and so on in 1925 order had been in vogue in the producing centres in London with- out increasing prices has extended, since the War has had upon the aeroplane and g’ is the easiest to surmount, although vari- TARIFFS ous restrictions were imposed. These provided for the formation of the Afines Department (1921-6); Impcrial Mineral Resources of South Dakota and Manitoba. Developments are based on the left flank of the