A photograph from the pool in the Shamrock Hilton Hotel in Houston demonstrates the size of the pool in that a ski boat with a skiier could put on a demonstration. It is among the items displayed in the Hilton College of Hotel and Restaurant Management&#039;s Library and Hospitality Industry Archives. Nick and Vicki Massad have made a grant to the Conrad H. Hilton College of Hotel and Restaruant Management&#039;s Library and Hospitality Industry Archives.  (Thursday, Sept. 27, 2007, in Houston. ( COPY SHOT by Steve Campbell / Chronicle)