Show great work of n in a gas aliory at ivry near paris a 9 laval turbine driven by jets of b teim was once set to work and when eairly under way was ras driven or 3 hours or days without stop ping for an instant an automatic kept it aubr bated and a work man visited it once in 12 hours to re the oil reservoir the speed of the circumference of the rotating disk being at a out alx ix n lies iles a minute ii a pont po nt on that circumference must have traveled in the co arse of the days almost five and on ona half times the distance from the earth to the moon harper a weekly |