Theratron model B cobalt 60 moving beam radiotherapy machine: Counter balance weight Theratron Radiotherapy Machine - Balance Weight
Counter-balance weight for the "Twin Equatorial" Telescope, 1885. Made by Sir Howard Grubb, consisting of a 20in. Reflecting Telescope and a 7in. Refracting Telescope (by Cooke) mounted together on one equatorial stand. With Grubb electric control gear Counter-balance weight 1885