He expressed his scientific instrumentalism with a tract on mechanics in De Motu. He defended Christianity against the anti-Anglican "free-thinkers" in Alciphron, and he later extolled the virtues of tar water before moving on to contemplate God in Siris. In his first major 
He expressed his scientific instrumentalism with a tract on mechanics in De Motu. He defended Christianity against the anti-Anglican "free-thinkers" in Alciphron, and he later extolled the virtues of tar water before moving on to contemplate God in Siris. In his first major work, he explored ideas such as minimum visibles and tangibles as they related to perception. After A New Essay Towards a Theory of Vision, his next two works laid out his views against abstraction, particularly that of Locke, and against materialism, holding that "to be is to be perceived." Author of Three Dialogues Between Hylas and Philonus and A Treatise Concerning the Principles of Human Knowledge, FTP name this Irish bishop and philosopher whose writings inspired the naming of the hometown of the University of California's flagship campus.
He expressed his scientific instrumentalism with a tract on mechanics in De Motu.
George Berkeley