An easy and fast to light, device for the improved cooking of food, made for using charcoal or similar fuel, comprising a generally convex shell or an envelope, a perforated partition dividing the shell or envelope into a lighting portion and a firebox, and a lid. A mixing device includes a number of mixing chambers which can be sequentially aligned with the foodstuff supply location. At the same time a small portion of the wash filtrate is also to be recirculated to the bottom of the digester as dilution liquid. 5:1 or a dispersible organic polymer and where the amount of dispersible polymer is such as to give a weight ratio of polymer to weight of of from 0. Each railway vehicle and each fixed station include processing elements for determining the identifier and the at least one message of each received signal.