'< kAfcTAGE" IN itfftlA. & 



effects attributed to it, and to the restriction of it, were 

 attributable only indirectly to the mode of operation, and 

 were attributable mainly to the conditions under which it 

 was practised or abandoned, in other words, to circum- 

 stances, determined by the state of the ground, as to access 

 of humidity or the reverse. 



