The volumetric proportions of each element in the oxides of nitrogen are exhibited below.
"An Introduction to Chemical Science"
R.P. Williams
This is a rough classification, for an opera does not necessarily compare with a square rood of paint or a novel of Tolstoyan length; indeed, on the volumetric basis, an opera may have less bulk than a sonnet.
"A Novelist on Novels"
W. L. George
Richards' Practical Chemistry, including Simple volumetric Analysis and Toxicology.
"Aids to Forensic Medicine and Toxicology"
W. G. Aitchison Robertson