Petrography lower if wholly or partly vitreous. The specific gravity of the more common rocks range from about 2.5 to 3.2. Archaeologists use petrography to identify mineral components in pottery. This information ties the artifacts to geological areas where the raw materials for the pottery were obtained. In addition to clay, potters often used rock fragments, usually called "temper" or "aplastics", to modify the clay's properties. The geological information obtained from the pottery components provides insight into how potters selected and used local and non-local resources. Archaeologists are able to determine whether pottery found in a particular location was locally produced
This Is What You Want... This Is What You Get He then flew over to London and presented them to Richard Branson as the finished new PiL album for Virgin Records: "Commercial Zone". For his part, John Lydon decided to completely abandon the tapes and re-record the whole album from scratch with session musicians. This new version of "Commercial Zone" became "This Is What You Want... This Is What You Get" in 1984. "The Order of Death" is a reference to the film "Copkiller", also known as "The Order of Death". The line "This is what you want... This is what you get", which gives title to the album, appears