<p>Benjamin Silliman Jr. (January 14, 1816 – November 24, 1885) was an American chemist and geologist who made significant contributions to the field of chemistry and geology. He is best known for his research on the chemistry of petroleum and natural gas, and for his work on the geology of North America.</p><p></p><p>Silliman Jr. began his career as a chemist and geologist at Yale College, where he earned his Ph.D. in chemistry in 1837. He later worked at the American Journal of Science and Arts, where he published several articles on the chemistry of petroleum and natural gas.</p><p></p><p>In 1855, Silliman Jr. published a paper on the geology of North America, in which he described the distribution of coal, oil, and natural gas in the continent. He also published several papers on the geology of New England and the Appalachian Mountains.</p><p></p><p>In addition to his work on the chemistry of petroleum and natural gas, and the geology of North America, Silliman Jr. also made important contributions to the field of mineralogy. He published several books and articles on the subject, including "Elements of Mineralogy" and "Manual of Mineralogy".</p><p></p><p>Silliman Jr.'s contributions to the field of chemistry and geology were groundbreaking, and his research on the chemistry of petroleum and natural gas, and his work on the geology of North America had a significant impact on the field. He was honored with many awards and honors for his contributions, including the Wollaston Medal from the Geological Society of London.</p><p></p><p>Benjamin Silliman Jr. was a pioneering chemist and geologist whose contributions to the field of chemistry and geology were groundbreaking. His research on the chemistry of petroleum and natural gas, and his work on the geology of North America had a significant impact on the field. His legacy continues to shape the field of chemistry and geology, and his</p><p></p><p></p>