t-o THE CULTURE 



inclination, and do not keep its plane ex* 

 a6lly parallel to the thread. 



The fmall twifl which the thread fufFers 

 as it approaches the puUy has this further 

 ufe, that it fecures the ends of the frefh 

 pods which are continually added, from 

 the hazard of fticking to the pully, and 

 fo of being ftripped from the main thread 

 and v/inded round the pully ^ and this will 

 be more effectually prevented if the thread 

 is made firil to pafs over, and bear a little 

 upon a fmall wire hook placed within an 

 inch or fo of the upper pully ; for then 

 the whole twift will be confined to that 

 part which lies between the hook and pul- 

 ly, and will thus fecure the end juft where 

 there is a neceffity : but without this hook 

 the twifl would be fpent over the whole 

 length of thread which lies between the pully 

 and the flop-wire, fo that it would be but 

 very little in any one part of that length. 

 However, there will be no occafion for the 

 hook unlefs it is found by experience, that 

 the end is apt to catch and flick to the 

 pully, which in my tryals I have not found. 

 I mentioned before that the groove of 

 the pully fliould be very fmooth, by which 

 I chiefly mean the very QdgQ of the angle 



where 



