EXUVLE, among naturalists, denote the cast-off parts or coverings of animals, as the skins of serpents, caterpillars, and other insects. See ENTOMOLOGY.
M. Reaumur is very particular in de scribing the manner in which the cater pillar tribe throw off, or extricate them selves from their exuvix. See vol. i. of the " history of Insects." The crab, some spiders and phalangii, as is well known, can even throw off their limbs at pleasure, which are again replaced by new ones. See CANCER.
Extvias is also used for the remains of sea animals, found fossile, and more pro perly called extraneous, or marine fossils.
EYE. See ANATOMY and OPTICS.
EYE, in architecture, is used to signify any round window made in a pediment, an attic, the reins of a vault, or the like.
EYE of a dome, an aperture at the top of a dome, as that of the Pantheon at Rome, or of St. Paul's at London : it is usually covered with a lantern.
EYE, in agriculture and gardening, sig nifies a little bud, or shoat, inserted into a tree, by way of graft.
EYE of a tree, a small pointed knot to which the leaves stick, and from which the shoots or sprigs proceed.
Era-bright. See EITERRASIA, the sixth letter of the alphabet, and 1 s fourth consonant, is by some rec koned a mute, and by others a semi-vowel: it is formed by forcing the breath out strongly, and at the same time joining the upper teeth and under lip: it has much the same sound with the Greek p, or ph in English words, and is only written in the words of Latin origin, ph be ing used instead of it in those derived from the Greek. Suetonius tells us,
that the Emperor Claudius invented the f, and two other letters ; and that it had the force of v consonant, and was wrote inverted As a numeral, F denotes 40, and with a dash over it thus 4Q000: in music, it stands for the bass clef ; and frequently for forte, as f does for forte forte.
As an abreviation, F stands for Jilin', fellow, and the like ; thus F. R. S. signi fies Fellow of the Royal Society.
FA, in music, one of the syllables in vented by Guido Aretine, to mark the fourth note of the modern scale, which rises thus, ut, re, fa.
Musicians distinguish two fa's, viz. the flat, marked with a and the sharp or natural, marked thus and called bi quadro.