sentences:  He is the great grandfather of Theodore H. Rowell, noted Minnesota pharmaceutical inventor, entrepreneur, and founder of Rowell Laboratories, Inc. JS Rowell was obsessed with the idea of improving the old methods of soil cultivation.His inventive genius and perseverance enabled him to make his dreams become a reality and become a benefactor to mankind.At the age of 15, he went to work for his brother George Rowell in Goshen, Indiana, who owned a plow foundry and blacksmith's shop, and learned the trade of plow making.