Filter/dilution tunnel. A smoke sample is drawn via a tube wherever it truly is diluted with air, the resulting smoke/air mixture is then pulled by way of a filter and weighed. This is the internationally acknowledged method of measuring smoke from combustion.[sixty six] 1600 – Tobacco used as funds-crop https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/