and worked amid art treasures and ancient furniture, handicapped by the almost total lack of liaison with the mathematicians, about 50 miles away. The ever-present problems of security added to the difficulties of Pers z. Ink was not permitted because it required blotting paper. Each night all papers had to be locked away. Waste paper had to be burned, and the ashes broken up to make sure that no cinder would float away. Later Pers z got a machine to shred the paper before it was incinerated. None of the codesolving groups was allowed to know what the others were doing—but these artificial barriers dissolved in the camaraderie of the Dahlem bomb-shelter. Security also meant political security, and even before the war the Nazis planted a spy in Pers z to watch for any signs of anti-Hitler activity. In 1942 Selchow became a Nazi. He took the honorary rank of Sturmfiihrer, which gave him access to three of four cars. The next year
The only difference: one of the subjects just finished a strong course of antibiotics and now lacks sufficient good bacteria for full digestion. Will the body composition outcomes be the same? Of course not. Rule #1: It's not what you put in your mouth that matters, it's what makes it to your bloodstream. If it passes through, it doesn't count. The creator of the "calorie" as we know it, 19th-century chemist Wilbur Olin Atwater, did not have the technology that we have today. He incinerated foods. Incineration does not equal human digestion; eating a replace log will not store the same number of calories as burning one will produce. Tummies have trouble with bark, as they do with many things. Scenario #2: Three females of the same race, age, and body composition each consume 2,000 calories daily for 30 days. Subject 1 consumes nothing but table sugar, subject 2 consumes nothing but lean chicken breast, and subject 3 consumes nothing but mayonnaise (2,000 calories is just 19
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