In this class, I hope you will learn not merely results, or formula applicable to cases that may possibly occur in our practice afterwords, but the principles on which those formula depend and without which the formula are mere mental rubbish. I know the tendency of the human mind is to do anything rather than think. But mental labor is not thought, and those who have with the labor acquired the habit of application often find it much easier to get up a formula than to master a principal. Clay's Pool Service, Inc. has been in the pool business for over 30 years, servicing Hanford, Lemoore, Riverdale, Caruthers, Selma and Kingsburg.