The word Chamomile comes from the Greek meaning ground apple, probably because of its apple-like fragrance. The Romans used Chamomile for incense. Roman Chamomile gained its name, not from ancient Rome, but because a 19th century plant collector found some growing on the ruins of the coliseum in Rome.
What Is Perfect Vision? In cases of normal vision, also called perfect vision or 20/20 vision, the eye is able to focus light from objects precisely on the retina at the back of the eye. Refractive errors occur when the eye is unable to properly focus light on the retina.
The integer n = 6 has the proper divisors 1,2,3. The sum of these divisors is 6, the number itself. A natural number n for which the sum of proper divisors is n is called a perfect number. So, 6. is a perfect number. All presently known perfect numbers are even. Here are the smallest 12 perfect numbers: 6,28,496,8128,33550336,8589869056,137438691328.