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Nancy Edison also sensed, or discovered by chance, the real direction of her son’s interests; for one day she brought forth an elementary book of physical science, R. G. Parker’s School of Natural Philosophy, which described and illustrated various scientific experiments that could be performed at home. Now his mother found that the boy had truly caught fire. This was “the first book in science I read when a boy, nine years old, the first I could understand,” he later said. Here, learning became a “game” that he loved. He read and tested out every experiment in Parker; then his mother obtained for him an old Dictionary of Science, and he went to work on that. He was now ten and formed a boyish passion for chemistry, gathering together whole collections of chemicals in bottles or jars, which he ranged on shelves in his room. All his pocket money went for chemicals purchased at the pharmacist’s and for scraps of metal and wire. Thus his mother had accomplished that which all truly great teachers do for their pupils: she brought him to the stage of learning things for himself, learning that which most amused and interested him, and she encouraged him to go on in that path. It was the very best thing she could have done for this singular boy. “My mother was the making of me,” he said afterward. “She understood me; she let me follow my bent.”29

Edison

Matthew Josephson

One long aerobic capacity–building workout each week. Do this at Zone 1 intensity if your AeT heart rate is within 10 percent of your LT heart rate. Do this at Zone 2 if you suffer from ADS (Aerobic Deficiency Syndrome, see page 46) and your AeT heart rate is more than 10 percent below your LT heart rate. This should leave you tired from the duration, not the intensity. This one workout should be 25 percent of the weekly aerobic training volume.

Training for the Uphill Athlete

Steve House, Scott Johnston, Kilian Jornet

Photosynthesis is always an extremely lopsided exchange of internal water (inside a leaf) for external CO2 (in the atmosphere). Anytime a plant opens its stomata (located on the underside of leaves) to import sufficient carbon for its photosynthesis, it loses large amounts of water. For example, transpiration efficiency (biomass produced per unit of water used) of wheat (whole plant) is 5.6–7.5 grams per kilogram, and this translates to about 240–330 kilograms of water per kilogram of harvested grain.[65]

How the World Really Works

Vaclav Smil

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