The persons who understand this subject, call the substance which forms the first foundation of their combs, commosis,[1] the next, pissoceros,[2] and the third propolis;[3] which last is placed between the other layers and the wax, and is remarkable for its utility in medicine.[4] The commosis forms the first crust or layer, and has a bitter taste; and upon it is laid the pissoceros, a kind of thin wax, which acts as a sort of varnish. The propolis is produced from the sweet gum of the vine or the poplar, and is of a denser consistency, the juices of flowers being added to it. Still, however, it cannot be properly termed wax, but rather the foundation of the honey-combs; by means of it all inlets are stopped up, which might, otherwise, serve for the admission of cold or other injurious influences; it has also a strong odour, so much so, indeed, that many people use it instead of galbanum.