The most popular include "Air Spring and Effects" in 1660 and "Sceptical Chemist" in 1661 ("Robert Boyle". Univ.) . “Air Spring and Effects” showed Boyle an improved version of the vacuum pump. Boyle improved on Von Guerickes' vacuum, which was a two-person process, by making it a one-person process ("Robert Boyle." Famous). “Sceptical Chemist” attacked Aristotle's view of the four elements; earth, air, fire and water. This book played a major role in the modern theory of chemical elements. Boyle is one of the founders of modern chemistry. Boyle may have had the greatest impact on the course of human history, with contributions such as his law (“Robert Boyle Life). Boyle is perhaps one of the most influential scientists ever born in Ireland.