Filter/dilution tunnel. A smoke sample is drawn through a tube in which it is diluted with air, the resulting smoke/air combination is then pulled via a filter and weighed. This can be the internationally identified way of measuring smoke from combustion.[66] Smoking could be dated to as early as https://kameronjbuka.mycoolwiki.com/7695676/the_fact_about_smoke_that_no_one_is_suggesting