For about two years he held a post at a French colliery, but returned to England in 1848. Here, after serving as chemist to a government commission on the question of coal for the navy, and as manager to some chemical works, he started on his own account as a
mining engineer and consulting
metallurgist in
London. From 1848 to 1850 he was also professor of metallurgy at the
College for Civil Engineers, Putney; and again, later in life, lectured at the
Royal Naval College, Greenwich, in 1875 and 1877. He continued to reside in London till 1868, but made frequent professional journeys to various parts of Europe and to North Africa, besides those already named. In the latter year he went to
Liverpool to build and manage the works of the Widnes Metal Company. The undertaking proved to be so prosperous that he was able to return to London in 1877, and afterwards to retire from business. He married Mary Ann Andrew, daughter of George Andrew of
Carne,
St Mewan, Cornwall, on 1 January 1850, and died suddenly on 5 January 1887, at 18 Fopstone Road,
S.W., leaving a son and a daughter. Phillips took out patents for improvements in metal production and refining, and was one of the first scientists to use the
polarizing microscope to study rock and mineral structures. ==Learned societies==