Preston A. Jones Sued For DivorceSan Rafael millionaire Pres- 1 ton A. Jones. 52. president of ! Prescolite Corp. with head- |quarters in San I^eandro, is be- ! ing sued for divorce in Marin ( Superior Court. jJanet G. Jones charges him with extreme cruelty and caus- j ing her grievous mental suffering in a complaint filed yester* * dav hv her attorney, William O. Weissich. The Joneses have ; a swank waterfront home at 16 1 Marina Way. j(Jones’ Prescolite Corp. man- ' tifactures light equipment and J has plants in Arkansas, Puerto Kico, and in Southern Caiifor- •nia.They were married in Mexico on Dec. 23, 1952, and separated last month. Mrs. Jones is asking for custody of their 7- j year-old son, reasonable sup- j port, and a fair share of com- , munity property. i \