Word: checkerboarding
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Dates: during 1940-1949
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Since then engineers have found, first by trial & error, then by more exact methods, that almost any soil may be used. On small jobs, little special equipment is needed. The ground is plowed, harrowed and cleared of larger stones. Bags of cement are spotted in a checkerboard pattern. Spread evenly, the cement is mixed dry with ordinary farm machinery, (disc and spring-tooth harrows are good), then sprinkled with water and mixed wet until an even color shows that the mix is right...
...into huddles with NBC Chief Engineer O. B. Hanson. Early in February, NBC's big studio was closed off. Workmen built a slanting roof over the stage, faced the back wall with a marcelled pattern of half columns (technical name: convex diffusers), turned the side walls into a checkerboard of curved sections-all done to encourage resonance...
Across Iowa's rich checkerboard of farm lands, men shucked the last of the hog-fattening corn, shaved the empty yellowed stalks from their fields, plowed the brown earth...
Worse still for Weygand, it appeared that the success of the German Blitzkrieg was the result of a major military invention. There have been such inventions before (e.g., the Macedonian phalanx, the Roman Legion with its checkerboard maniple), and usually they have given their inventors military mastery for generations. Not merely tanks, not merely bombers, not merely greater concentrations of troops and materiel but a new military technique of using all these things together was the secret of German success...
Closely connected with guerilla bands in Shansi and other provinces of northern China, Major Carlson said that China is like a checkerboard with the Japanese holding the lines and the Chinese the squares. Meaning that the invaders control the railways and the defenders hold the space between, he recalled that in one place, a small defending force surrounded on four sides has not surrendered to the enemy in almost a year of fighting...