When dull flat atoms do together1 join,
And with each other in a heap combine,
This body thick doth stop all passage so,
Keeps motion out, and makes2 the body grow
Numbed. For sharp atoms,3 in which heat doth live, 5
Being close and smothered up4 no heat can give,
But if these5 atoms flat meet in the brain,
The spirits are choked and can6 no heat obtain.