text: Red hot Google shares cooling  Google Inc. may be subject to the law of gravity, after all. Its shares, which more than doubled in the two months after the company's Aug. 19 initial public offering and traded as high as \$201.60 on Nov. 3, have slipped about 17 percent over the past two weeks. They closed at \$167.54 yesterday, down 2.88 percent for the day, ...