Cinchona another fever remedy. The bark of cinchona can be harvested in a number of ways. One approach was to cut the tree but this and girdling are equally destructive and unsustainable so small strips were cut and various techniques such as "mossing", the application of moss to the cut areas, were used to allow the tree to heal. Other approaches involved coppicing and chopping of side branches which were then stripped of bark. The bark was dried into what were called quills and then powdered for medicinal uses. The bark contains alkaloids, including quinine and quinidine. Cinchona is the only
Naturally aspirated engine Naturally aspirated engine A naturally aspirated engine is an internal combustion engine in which oxygen intake depends solely on atmospheric pressure and does not rely on forced induction through a turbocharger or a supercharger. Many sports cars specifically use naturally aspirated engines to avoid turbo lag. In a naturally aspirated engine, air for combustion (diesel cycle in a diesel engine or specific types of Otto cycle in petrol engines—namely petrol direct injection), or an air/fuel mixture (traditional Otto cycle petrol engines)—is drawn into the engine’s cylinders by atmospheric pressure acting against a partial vacuum that occurs as the piston travels