Show Hot Ice Is Produced by Harvard I Professor Cambridge Mass Ice Ice hot enough to burn one severely has been produced produced produced pro pro- by Prof Proto P. P W. W BrIdgman of ot Harvard university High pressures are used to produce pro duce hot Ice Ice which melts at four tour degrees below zero Is obtained at pounds pressure and at pounds pressure water remains remains re re- re- re mains solid at degrees Fahrenheit Fahren Fahren- heit Professor BrIdgman's method of producing high pressure Is described described de do- scribed by him as simple Here ItIs Itis it itIs Is Take a large thick block of ot steel bore a hole In It and put liquid Into the hole Then put Into the top of the hole bole a plug which will not leak and push on the plug A limit of the high pressure obtainable is set by two things The leaking of ot the plug and the yielding of ot the steel container In a few cases pressure up to pounds have been reached The danger of the process Is seen by bythe bythe bythe the fact that It has been found necessary necessary necessary essary to set some pieces of ot apparatus apparatus ap ap- ap behind boiler boller plate to protect protect protect pro pro- the operators for tor such fluch extreme pressures are 10 to 20 times Umes those in range longe-range guns |