xiv THE JOURNAL OF THE MINISTRY OP AGEICULTURB.— .4averiiseme»is. 



OFFICIALLY APPROVED BY CHARLES Y. KNIGHT 

 FOR SLIDE-VALVE ENGINES. 



''The only Oil 

 for Ttactots.^^ 



THE BRITISH MONOGRAM OIL CO. (1919) LTD., | 

 Monogram Works, Acton Vale, W.3. 



'Phone Ko. : 1012 Chiswic-k. 'frrams: " Oilograniie, London" 



