Word: f2
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...result of uncommon-sense reasoning, doctors are inducing early abortions with prostaglandin F2 alpha, a hormone-like substance derived from semen. The prostaglandins are a class of chemicals, 16 of which have now been isolated, that were originally believed to be secreted in the prostate gland. The first were found in human semen, which is still the richest source known. Now prostaglandins are known to occur in many other human tissues and in menstrual fluid. They are also found in the semen of sheep, and it was from the seminal vesicles of rams that medical researchers obtained their early supplies...
...London. There, Obstetrician Gilbert M. Filshie worked with Dr. S.M.M. Karim, a biochemist, to select a prostaglandin that would induce an abortion early in pregnancy, yet produce a minimum of side effects, such as altering the blood pressure. They devised a solution containing 50 micro-grams of PG F2 alpha per milliliter, and infused it into the veins of 15 women who were from nine to 22 weeks pregnant. The amount was tiny: only one milliliter (one-fifth of a teaspoonful) per minute. The infusion was continued until uterine contractions brought about a complete abortion...
Suddenly the steep plummeting dive changed to a semblance of flight. Under control of Veteran NASA Test Pilot Milton Thompson, the experimental M2-F2 "lifting body" demonstrated an uncanny ability to maneuver. Wingless and powerless, the 21-ton, 22-ft.-long craft swung through two 90° turns as it dropped through its rapid descent. At the last moment it lifted its nose, lowered its tricycle landing gear and streaked to a spectacular 200-m.p.h. landing on the flatbed of Rogers Dry Lake at Edwards Air Force Base. By successfully executing its unusual 217-second flight, the M2-F2 pointed...
Flight without wings-which are useless "in space and would be burned and torn away by the temperatures and stresses of re-entry-is made possible by the M2-F2's odd aerodynamic shape, which provides substantial lift in a fast-flowing airstream. Two sturdy rudders enable the craft to turn, and small flaps can be used to pitch its nose up or down. With such controls, a lifting body returning to the atmosphere from orbit at 18,000 m.p.h. might start on a trajectory designed to terminate near Kansas City, and still have the capability of flying...
...first practical use of a lifting body will probably be to serve as a ferry carrying scientists and supplies to and from permanent orbiting laboratories. Long before that happens NASA will have to complete a series of increasingly ambitious experimental flights. In the future, a version of the M2-F2 will be equipped with an X-15 rocket plane engine and sent to an altitude of 80,000 ft. at a speed of 1,200 m.p.h. before starting its powerless descent. As more funds become available, a piloted lifting body with a heat shield will be launched from Cape Kennedy...