A short 1872 engineering journal article describing a pneumatic oven for stifling and drying silk cocoons, an apparatus devised by Professor Castrogiovanni and reported by George Latham at Trieste. It compares hot-air and steam methods of treating cocoons and explains the oven's parts: a water reservoir heated by a small furnace, a counterweighted metal bell with exhaust cock and thermometer, and two trays on rails. It also gives operating details such as the 100° thermometer reading and 15-20 minutes of exposure, and claims better silk quality and colour. A cutaway engraving illustrates the apparatus.