( 38 ) 
and in this you will be regulated according 
to the working of the bed, as fome will be 
fit to fpawn in two, three, or four weeks, 
others not in lefs than five or fix, according 
to their length, and the ftrength of the dung. 
A bed of fifteen or twenty feet long will be 
fooner ready for fpawning than one of forty 
or fifty. 
After the bed has been made a fortnight or 
three weeks, examine it frequently by the 
trying-fiicks, which we advifed, examining 
them frequently and you will readily difeover 
the requifite heat and proper flate to admit 
of fpawning. 
Sometimes in very fubfiantial beds, after 
they have remained fecmingly long enough, 
and we are doubtful of an increafe of heat, 
we begin fpawning on the lower part of the 
bed firft, which part becomes warm before 
the 
