Show wool made from stones stone possibility of future manufacture on a large scale ot at rock wool from roin mineral deposits la in the niagara peninsula of ontario it indicated by a report issued by the th Cana canadian dinn department of mines thit conclusion Is based upon successful experiments in the departments laboratories where rock wool of high quality has been made from samples ot at rock obtained from the deposits rock wool Is a product which up to the present has not been manufactured in canada it la Is used at an insulator for all types of build ings and tor for numerous industrial purposes where it Is not subject to excessive vibration with the development of ft a very long flexible wool that doe not break down under vibration such as has been produced on an i experimental scale from canadian raw material its field of service in li blanket form may be extended te t insulation for ships and railway trains A new and steadily widen in ing market tor for rock wool Is in the th soundproofing sound proofing and acoustical treat ment of auditoriums offices theaters and radio stations its fire proof and vermin proof nature make it especially valuable tor for these pur poses |