]> Vacui&stress;tieswith Physicians those days in which an imperfect or ill crisis of a distemper often happens, viz. the sixth, eighth tenth, twelfth, sixteenth, and eighteenth, which days are also call'd Medicinal Days, because medicines may be given on them. Veal Moneyin the manour of Bradford in Wiltshire a yearly rent paid by the tenants to their lord, instead of a quantity of veal, antiently given in kind, called Veal-Noble-money. Vermi&stress;vorousnessof vermes and vorax, devouring, and ness a worm-devouring nature. Vi&stress;sionF. visione of visio is a sensation in the brain, which proceeds from a due and various motion of the optick nerves, produced in the bottom of the eye, by the rays of light coming from any object, by which means the soul perceives the enlighten'd thing, together with its quantity, quality, figure, &ersand;c. Vi&stress;sion an apparition, phantasm or ghost; also a divine revelation in a dream. Visionin Opticks the physical cause of vision or sight seems to be that the rays of light, striking on the bottom, of the eye, do there excite certain vibrations in the Tunica Retina; which vibrations being propagated, as far as the brain by the solid fibres of th Optick Nerves, do there cause the sense of Seeing. For as dense bodies do retain their heat longest, and that in proportion to their density, they retain it longer as they are more dense; so the vibrations of their particles are of more durable nature than those of rarer bodies, and can be propagated to greater distances; wherefore the solid and dense fibres of the nerves, whose matter is of an homogeneal and uniform nature, are very proper to transmit to the brain such motions as are impress'd on the external organs of our senses. For that motion, which can preserve itself a good while in one and the same part of any body, can also be propagated a great way from one part of it to another; provided the body be of an homogeneal nature, and that the motion be not reflected, refracted, interrupted, or disturbed by any inequality in that body. Clear Visionin Opticks is caused by a great quantity of rays in the same pencil enlightening the corresponding points of the image strongly and vigorously. Confused Vision is caused by the pencils of rays being intermix'd one with another. Vitellia&stress;ni a kind of pocket or table-book, in which the antients wrote down their ingenious humours, wanton fancies, and impertinencies; what we call a Trifle-Book. Under-chamberlainof the Exchequer an officer who cleaves the tallies written by the clerk, and reads the same, that the clerks and comptrollers of the pell may see that their entrance be true. Unle&stress;tteredof un and Litera illiterate, not having letters on the back as books. Voy the tripthong Uoy is no where found in the English tongue but in the word bouy and it's derivatives, in which it is pronounc'd little differing from oy. Upwhi&stress;rledof up and hwyrfan whirled upwards. Ura&stress;niain Painting &ersand;c. is represented as a beautiful lady in an azure robe, having her head adorned with a coronet of bright stars, and holding in her right-hand the celestial globe, and the terrestrial in her left. Urano&stress;scopist one who observes the course of the heavenly bodies, an astronomer. Urano&stress;scopyx x x x astronomy, a contemplating the heavenly bodes. Urbaneurbanus courteous, civil