xiv THE JOUENAL OP THE MINISTRY OP AOmCVUIVnE.— Advertisement s. 



OFFICIALLY APPROVED BY CHARLES Y. KNIGHT 

 FOR SLIDE-VALVE ENGINES. 



" The otily Oil 

 for Tractors.'^ 



THE BRITISH MONOGRAM OIL CO (1919) LTD., 

 Monogram Works, Acton Vale, W.3. 



Thone No.: 1012 Chiswifk. 'Grams: " Oilogramic. London' 



