The U.S. Postal Service has announced a postage rate increase for select mail classes and services for 2015. The new postage rates will start on Sunday, April 26, 2015. First Class Letters & Postcards. The cost to send a one ounce First Class Letter will NOT BE INCREASING and will remain $0.49. Additional ounces will cost $0.22, a one cent increase from 2014.
Aristotle was a Greek philosopher who lived between 384-322 B.C. He was one of the greatest thinkers of the world and his written works encompassed all major areas of thought. Aristotle mistakenly believed that the Earth was at the center of the universe and made up of only four elements: earth, water, air, and fire.
These things are not a part of something nor are they in something else. These are primary substances. Primary substances are certain kinds of things. These species and the genera of these species are all secondary substances. For example, Aristotle is a human being â the kind of thing that Aristotle is. But human beings are a kind of animal. So human beings and animals are both secondary substances of Aristotle. This passage very clearly describes what primary substance and secondary substance refer to.