The Story of Tools: How They Built Our World and Shaped Man's LifeExplains how man has achieved all the mechanical advances he knows through the use of five simple machines--lever, wheel and axle, pulley, screw, wedge, and plane. |
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Results 1-3 of 15
Page 32
... horse a couple of cen- turies later . All were used as pack animals and to draw sledges . Except for the dogs , the animals were also ridden and used to raise ore from mines . Contrary to what you would expect , the horse and donkey ...
... horse a couple of cen- turies later . All were used as pack animals and to draw sledges . Except for the dogs , the animals were also ridden and used to raise ore from mines . Contrary to what you would expect , the horse and donkey ...
Page 33
... horse can now pull . The horse collar and the horseshoe finally made it possible to use the strength of the horse in a variety of ways . They were in- vented only 700 years ago — a good 3,000 years after the animal was tamed ...
... horse can now pull . The horse collar and the horseshoe finally made it possible to use the strength of the horse in a variety of ways . They were in- vented only 700 years ago — a good 3,000 years after the animal was tamed ...
Page 56
... horses . Fifteen hundred years later the obelisk was moved again , from a plaza in Rome to the square facing the great church of St. Peter's . How was it done ? In almost exactly the same way : with capstans and levers and a straining ...
... horses . Fifteen hundred years later the obelisk was moved again , from a plaza in Rome to the square facing the great church of St. Peter's . How was it done ? In almost exactly the same way : with capstans and levers and a straining ...
Contents
The Only Toolmaker | 3 |
From Fist Ax to Plow | 10 |
Putting Fire to Work | 21 |
Copyright | |
12 other sections not shown
Common terms and phrases
aeolipile American animals atomic fuel automation automobile began boring mill Bronze Age bucket build built called cams centuries chine circuits coal copper cylinder device distance drill effort arm electricity electronic energy England factories farmers farming Fertile Crescent fire fist ax fulcrum furnace gear GRANGER COLLECTION hammered hand harness heat Hero's holes horse inch inclined plane Industrial Revolution internal-combustion engine invention inventors Iron Age Karl Benz laser laser beam lathe learned lever Leyden Jar light machine tools machinery magnet man's manufacturing mechanical metal miles million Miner's Friend motion motor move musket needed neutrons nuclear Olduvai Gorge operation patent plow pole produce pull pulley pumping reactor rock scientist screw shape signal simple machines spinning steam engine stick Stone Age subatomic particles tape things tion toolmaking transducers turn United uranium valve water wheel Watt Watt's wheel and axle Whitney wire