“If Atomes are as small, as small can bee,
They must in quantity of Matter all agree.”
Margaret Cavendish
The Blazing World
'The weight of Atomes', in The Atomic Poems of Margaret (Lucas) Cavendish, Duchess of Newcastle, from her Poems, and Fancies, 1653, an electronic edition. Edited with an introduction by Leigh Tillman Partington. http://womenwriters.digitalscholarship.emory.edu/toc.php?id=atomic