English oil painter, indisputably one of the finest landscape artists ever and also regarded by many as the founder of English watercolor landscape painting.   A virtually uneducated child who was taught to read by his father he possessed a remarkable natural talent for art and was fortunate enough to be successful as an artist for the whole of his career.   As a child of only 12 to 13 he displayed drawings in his father's shop window for sale and by the time he was 15 had received the rare honor of having one of his paintings exhibited at the Royal Academy which he was admitted to as a Full Member when he was only 27.   He had his own studio by the age of 18 and by 20 he had print sellers clamoring for his paintings for reproduction.    Turner traveled widely in Europe and Venice in particular was the inspiration of some of his finest work.  He developed his own technique of translating the scene he saw to one filled with light  reflecting whatever climatic condition he chose.