Prof. Karl Ludwig. General John Newton. Charles H. Cramp. Character and Physical Conditions. A Valuable Hint. The Monkey and the Sugar. The Use of Compressed Air for Raising Water. Maximum Air Pressures in which Men Can Work., scientific american, 1895-05-18

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Prof. Karl Ludwig. General John Newton. Charles H. Cramp. Character and Physical Conditions. A Valuable Hint. The Monkey and the Sugar. The Use of Compressed Air for Raising Water. Maximum Air Pressures in which Men Can Work., scientific american, 1895-05-18

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