The ISO (International Standards Organisation) assigns a two character code to each country name. These codes are used by Internet 'whois' databases (these two character abbreviations are the whois country codes) and also other applications.
The Peacock Butterfly (Vanessaio or Inachis io) is a medium-sized British, European and Asian butterfly of the family brush-footed butterflies (Nymphalidae) family with a prominent eyespot on each reddish-brown wing. The caterpillars feed on stinging nettles. Research Peacock Butterfly
Correggio was the name taken by Antonio Allegri from his birthplace near Modena. He was an Italian painter and was born in 1494 at Corregio and died in 1534. Little is known of his life, which was very retired. Almost the only anecdote told of him is that on seeing the St Cecilia of Raphael he exclaimed 'Anch 'io son pittore' (I also am a painter), but thia is doubtful. Correggio is unrivalled in chiaroscuro and in the grace and rounding of his figures. Among his best pictures are Night, in which the chief light is the glory beaming from the infant Saviour; the St Jerome; the Marriage of St Catherine; several Madonnas, one of them (called La Zingarella, or the Gipsy Girl) said to represent his wife; the Penitent Magdalene; the altar-pieces of St Francis, St George, and St Sebastian; Christ in the Garden of Olives; the fresco of the Ascension in the Church of St John, Parma; the Assumption of the Virgin in the cathedral of the same city; the Ecce Homo, and Cupid, Mercury, and Venus, both in the National Gallery, London. Research Correggio
In Greek mythology the Argus was a beast and son of Arestor with a hundred eyes of which he could only close two at a time. He was placed by Juno to guard Io, whom Jupiter had changed into a heifer. But Mercury, who was sent to carry her off, managed to surprise and kill Argus whereupon Juno transferred his eyes to the tail of a peacock, her favourite bird. In Greek mythology, Argus was the name of the builder of the Argo, the ship that carried the hero Jason in his quest for the Golden Fleece Research Argus
In Greek mythology, Epaphus was a son of Zeus and Io who was born on the River Nile. He became King of Egypt and married Memphis, or by some accounts Cassiopeia. he had a daughter, Libya, who gave her name to the African country of Libya. Research Epaphus
In Greek mythology, Io was the daughter of Inachus. She was beloved of Zeus. Zeus changed her into a white heifer to protect her from the jealousy of Hera. Research Io
Arithmetic (from the Greek arithmost, number) is primarily the science of numbers. As opposed to algebra it is the practical part of the science. Although the processes of arithmetical operations are often highly complicated, they all resolve themselves into the repetition of four primary operations, addition, subtraction, multiplication, and division. Of these the two latter are only complex forms of the two former, and subtraction again is merely a reversal of the process of addition. Little or nothing is known as to the origin and invention of arithmetic. Some elementary conception of it is in all probability coeval with the first dawn of human intelligence. In consequence of their rude methods of numeration, the science made but small advance among the ancient Egyptians, Greeks, and Romans, and it was not until the introduction of the decimal scale of notation and the Arabic, or rather Indian, numerals into Europe that any great progress can be traced. In this scale of notation every number is expressed by means of the ten digits, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, by giving each digit a local as well as its proper or natural value. The value of every digit increases in a tenfold proportion from the right towards the left; the distance of any figure from the right indicating the power of 10, and the digit itself the number of those powers intended to be expressed: thus 3464=3000+400 +60 +4.
The earliest arithmetical signs appear to have been hieroglyphical, but the Egyptian hieroglyphics were too diffuse to be of any arithmetical value. The units were successive strokes to the number required, the ten an open circle, the hundred a curled palm-leaf, the thousand a lotusflower, ten thousand a bent finger. The letters of the alphabet afforded a convenient mode of representing figures, and were used accordingly by the Chaldeans, Hebrews, and Greeks. The first nine letters of the Hebrewalphabet represented the units, the second nine tens, the remaining four together with five repeated with additional marks, hundreds; the same succession of letters with added points was repeated for thousands, tens of thousands, and hundreds of thousands.
The Greeks followed the same system up to tens of thousands. They wrote the different classes of numbers in succession as we do, and they transferred operations performed on units to numbers in higher places; but the use of different signs for the different ranks clearly shows a want of full perception of the value of place as such. They adopted the letter M as a sign for 10,000 and by combining this mark with their other numerals they could note numbers as high as 100,000,000. The Roman numerals which are still used in marking dates or numbering chapters were almost useless for purposes of computation. From one to four were represented by vertical strokes I, II, III, IIII, five by V, ten by X, fifty by L, one hundred by [, afterwards C, five hundred by D, a thousand by M. These signs were derived from each other according to particular rules, thus V was the half of X, A being also used; L was likewise the half of [. M was artistically written M and cIo, and Io, afterwards D, became five hundred, ccI represented 5000, ccIoo 10,000 Iooo 50,000, cocIooo 100,000. They were also compounded by addition and subtraction, thus IV stood for four, VI for six, XXX for thirty, XL for forty, LX for sixty.
Arithmetic is divided into abstract and practical; the former comprehends notation, numeration, addition, subtraction, multiplication, division, measures and multiples, fractions, powers and roots; the latter treats of the combinations and practical applications of these and the so-called rules, such as reduction, compound addition, subtraction, multiplication, and division, proportion, interest, profit and loss, etc. Another division is integral and fractional arithmetic, the former treating of integers, or whole numbers, and the latter of fractions. Decimal fractions were invented in the sixteenth century, and logarithms, embodying the last great advance in the science, in the seventeenth century. Research Arithmetic
The Aermacchi AL60 is an American-designed Italian utility light transport aircraft that entered service in 1961. The Aermacchi AL60 is powered by a Textron Lycoming IO-720-A1A flat-eight piston engine providing a top speed of 251 kmh and a range of 1037 km. The Aermacchi AL60 carries a flight crew of two and can also carry six passengers; two litters, one seated passenger and an attendant; or 1440 lbs of freight in the cabin. Research Aermacchi AL60
The Aero Commander Ag Commander A-9 is an American single-seater agricultural monoplane developed from the CallAir series of agricultural aircraft and first produced in 1963. The Aero Commander Ag Commander A-9 is a braced low-wing monoplane powered by a Lycoming O-540-B2B5 six-cylinder horizontally-opposed air-cooled engine providing a top speed of 191 kmh. Later a version was produced fitted with the Lycoming IO-540 six-cylinder engine and a larger hopper. This version was named the Ag Commander A-9 Super. Research Ag Commander A-9
The Aero Commander Ag Commander B-1 is an American single-seater agricultural monoplane developed as a scaled up version of the Aero CommanderAg Commander A-9 agricultural aircraft. The Aero Commander Ag Commander B-1 is a braced low-wing monoplane first flown in 1966 and powered by a Lycoming IO-720-A1A eight-cylinder horizontally-opposed air-cooled engine providing a top speed of 191 kmh. Research Ag Commander B-1
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
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