Petrography rock was affixed to a microscope slide and then ground so thin that light could be transmitted through mineral grains that otherwise appeared opaque. The position of adjoining grains was not disturbed, thus permitting analysis of rock texture. Thin section petrography became the standard method of rock study. Since textural details contribute greatly to knowledge of the sequence of crystallization of the various mineral constituents in a rock, petrography progressed into petrogenesis and ultimately into petrology. It was in Europe, principally in Germany, that petrography advanced in the last half of the nineteenth century. The macroscopic characters of rocks, those
This Is What You Want... This Is What You Get This Is What You Want... This Is What You Get This Is What You Want... This Is What You Get is a 1984 album by Public Image Ltd. It is the band's fourth official studio album and includes the single "Bad Life" and a re-recorded version of a "This Is Not a Love Song", which had been a No. 5 UK and international hit when released as a single in 1983. An early version of the album was released in 1983 by founding PiL guitarist Keith Levene as "Commercial Zone". The album was then re-recorded after Levene's departure from the