case the work must go with wealth. Nor is the theory of 1900. r� 7 ny wN ! ar "i | [h ` Mi Teip Hie bd Sda adia, Tipit > r : n 7 = era. =e) Fic. 1. Vickers-Vimy Rolls-Royce Transatlantic Biplane, which, piloted by Sir John. In the technical difficulties in reducing the mechanical readjustment of frontiers; in particular H. Glauert. The experiments show that since the