STAR TELLS HOW* The 2-7-10 Split *TO MAKE SPARES9Sixth of eight lessons In spare bowling by “Count John Gcngler, the Belgian star, now bowling In the United States and ranked next to Jimmie Smith, the world champion.BY “COUNT JOHN GENGLER Roll a Hlinrt hook from the right shlo of tho nlleyn, striking No. 2 mil' quarter full No. 2 will ho knocked to tin* right corner of theUjh vh. getting No. 10, and the hull will follow thru to get the 7 pin.