VI FURTHER CHARACTERS OF THE BACILLUS 57 



lie in the direction of what is popularly known as 

 the stamping-out process. Any grouse on the moors 

 at all suspicious at any time should be destroyed, 

 and every grouse thus destroyed or that dies of the 

 disease should be carefully removed and burned. I 

 am not sure that those who burn the heather on 

 moors on which grouse - disease prevails are not 

 following a right plan, for the reason that hereby 

 they remove that which most likely harbours the 

 adhering infective material ; nor am I sure that, on 

 moors 'on which disease has been present, an exten- 

 sive battue of grouse would not also remove many 

 of the birds that have the disease in a mild form, and 

 that might carry it on, as it were, through the autumn 

 and winter. It is therefore especially important that 

 during autumn, and possibly the winter, a careful 

 look-out should be kept for suspicious grouse, for 

 it is these which require removal particularly. 



