Logan Republican | 1907-06-01 | Page 2 | Most Nearly Perfect Vacuum

Most Nearly Perfect Vacuum. It was Prof. Dowar's achlovemont in' liquefying hydrogen that led to the discovery ot an cany method of obtaining ob-taining an almost perfect vacuum, and that In a Blnglo minute. ' When a glass tubo filled with air and closed at ono end has Its open end dipped Into a cup of liquid hydrogen, hy-drogen, tho Intcnso cold condenses tho air Into a kind of snow, that sot-tics sot-tics to tho tiottom. If, then, tho upper part of tho tubo, from which tho solidified sol-idified air has fallen, Is removed by heating and cooking It off It bocoiqes a vacuum chamber so freo from air that It Is difficult to force an olectrio current through it., '