Filter/dilution tunnel. A smoke sample is drawn through a tube where it is actually diluted with air, the resulting smoke/air combination is then pulled via a filter and weighed. This is the internationally acknowledged technique of measuring smoke from combustion.[66] )[18] Magnetic remanence, recorded during the iron oxide particles, https://jaredkznco.wikicorrespondent.com/6221632/a_simple_key_for_tabacco_unveiled