Word: prevents
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Dates: during 1940-1949
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Open revolt broke out among the ranks of the Harvard line yesterday when they learned that there was no scrimmage planned, in an effort to prevent injuries. But when line coach Lyal Clark returned to his duty after a short absence, the forwards were tearing madly into each other in a little rough work of their...
With dominant sea and air power, these two nations could prevent a resurgence of either internal tyranny of external aggression on the part of any other country, he stated...
...reason is that the same high octane factors which prevent knocking, i.e., lost power, also deliver greater power to the cylinders...
...days the execution of the next hundred hostages. To explain this change of heart Vichy authorities is sued an official statement. "It is rumored in Vichy," the announcement said, "that Marshal Pétain wished to give himself up as a hostage in the occupied zone to prevent additional executions planned as a result of attacks at Nantes and Bordeaux. The Marshal's Cabinet has no declaration to make on the subject." The announcement of this "rumor" was all the protest Vichy dared to make...
Knocking is caused by premature explosion of gasoline vapors before the piston has returned to the cylinder head. These out-of-rhythm explosions can ruin a motor, perhaps break its crankshaft. High octane materials-octane, lead, alkylates-prevent these premature explosions by slowing down the rate of explosion. Though all gasoline explosions are a matter of split seconds, some are "slow," others "fast." Each kind of hydrocarbon in gasoline ignites at a slightly different temperature and compression. Igniting slowly and in order, they give the piston a firm, continued push instead of a brief, wrenching, power-wasting punch. So high...