1) Conical utensils 2) Cylindrical smokestacks 3) Steamship smokestacks 4) Tubes go N twice with fuels 1) Tornados 
[laboratory] Laboratory funnels are funnels that have been made for use in the chemical laboratory. There are many different kinds of funnels that have been adapted for these specialized applications. Filter funnels, thistle funnels (shaped like thistle flowers), and dropping funnels have stopcocks which allow the fluids to be added to a fl...