Show wool made from stones possibility of future manufacture on a large scale of rock ock wool from mineral deposits to in the niagara peninsula ot of ontario is i indicated by a report issued by tho the canadian department deportment of mines this conclusion Is based upon successful experiments in the departments laboratories ora where rock wool of high quality has been made from samples ot of rock obtained from the deposits rock hock wool Is 19 a product which up to the present has not been mano fractured in canada it Is used as an insulator for nil all types of buildings and for numerous nume industrial purposes where it Is not subject to excessive vibration with the development of a very long flexible wool that does not break down under vibration such as has been produced on an i experimental scale from canadian raw material its field of service in blanket form may be extended to insulation tor for ships and railway tr trains altis A new and steadily widening market tor for rock wool Is in the arund proofing and acoustical treatment of auditoriums offices theaters and radio stations its fireproof and vermin proof nature makes it especially valuable for these purposes P OS es |