OCR Text |
Show ! Making Mineral Wool. An American firm operating In Aus- trails htis started works near Mel- I bourne for turning the local basalt Into "mineral wool" for use as an Insulator In packing machinery and Ice chests and as a substitute for asbestos, according ac-cording to the Scientific American. The basalt Is melted down with a proportion pro-portion of freestone and limestone and then steam, at an Immense pressure, Is forced IhrouKh Uie fluid. The liquid rock, thus aerated, Hies into the air mid fulls lu flakes oil the floor. |