41. This early air conditioner system was modeled from a German mine shaft compressor. 42. A first mine shaft was sunk by French engineers on Christmas Day 1914. 43. Your doofus son, Timmy, has fallen down a mine shaft . Again! 44. They suffocated after falling into a hidden mine shaft and being covered with snow. 45. At least two miners were reported missing near Toledo after a mine shaft collapsed. 46. There are remnants of the a sorting house and the old mine shaft itself. 47. Many of them specialized in pumping the water out of very deep mining shafts . 48. Hundreds of strikers surrounded the mine shafts to prevent others from reporting to work. 49. Similarly, important producers of the war industry were moved into the mine shafts . 50. This shows Bradley, the canal and many coal mine shafts and iron works.
