HYA
H YD
for her, once to see or hear any thing done. She soon made ither own. She was her father’s amanuensis and assistant upon alloccasions; she wrote for him, and read to him, in all languagesand sciences ; she made drawings for him of all kinds, astronomi-cal, mathematical,, mechanical, &c. She arranged and managedhis library, and knew where every book stood, so that she couldfind them even in the dark. She was author of several ingeniouscompositions and calculations. She extracted the square roots ofmost of the second 1000 numbers, to 12 places ot decimals, andproved the truth of them, by means of differences ; arranging thewhole in a table tit for publication. She drew elegant geographi-cal maps, and only the second day before she died, began andcompleted the whole hemisphere of the earth, in composition,whether epistolary or scientific, her style was excellent. In tuemidst of all these literary acquisitions, she was so active in family-affairs, that she was no less useful to her mother, in her domesticconcerns, than to her father in his scientific business. To all thesequalifications, she added uncommon goodness, affability, cheer-fulness, and sweetness of disposition, which made her as much be-loved, as her extraordinary talents and acquirements made her ad-mired.
HUXING, among fishermen, a particular method of catch-ing pikes. For lliis~purpose, they take thirty or forty as largebladders as can be got ; blow them up, and tie them close andstrong ; and at the mouth of each tie a line, longer or shorter ac-cording to the depth of the water. At the end of the line is fas-tened an armed hook, artfully baited ; and thus they are put intothe water with the advantage of the wind, that they may gentlymove up and down the pond, till the bait is seized by the fish.HUY, a town of France, 12 miles S. S. W. of Liege .
HUY GENS, Christian, one of the greatest mathematiciansand astronomers of the 17th century, was the son of ConstantineHuygens, lord of Zuylichem, who had served three successiveprinces of Orange in the quality of secretary. He was born atthe Hague , in 1629, and discovered from his infancy an extraor-dinary fondness for the mathematics; in which he scon madegreat progress, and perfected himself under the famous professorSchooten, at Leyden. In 1649, he went to Holstein and Den-mark, in the retinue of Henry count of Nassau ; and intendedgoing to Sweden, to see Des Cartes , but the count’s short stay inDenmark would not permit him. lie travelled into France andEngland ; was, in 1663, made a F. R. S. and, upon his returninto France , M. Colbert, being informed of his.merit, settled aconsiderable pension’upon him to engage him to fix at Paris ; towhich Mr. Huygens consented, and staid there from 1666 to1681, where he was admitted a member of the Academy ofSciences . He loved a quiet and studious life, and often retiredinto the country to avoid interruption, but did not contract thatmoroseness which is so frequently the effect of solitude. He wasthe first who discovered Saturn’s ring, and a third satellite be-longing to that planet, which had escaped the eyes of formerastronomers. He discovered the means of rendering clocks ex-act, by applying the pendulum, and rendering all its vibrationsequal by the cycloid. He brought telescopes to perfection, mademany other useful discoveries, and died at the Hague in 1695.He was the author of several excellent works. The principal ofthese are. contained in two collections ; the first printed at Ley-den in 1682, in 4to. entitled “ Opera Varia;” and the second at
Amsterdam in 1728, in two volumes, 4to. entitled “ Opera Re-liqua.”
HUZZOOR, a Hindostan word sisnifvine the presence •- ap-
yellow, they call it a rubacelle.'tabled :
A specimen Irom Ceylon con-
Loss.,
95.50,. 4.50
100
When exposed to the blow-pipe it loses its colour, but not itstransparency : it is infusible, excepting with borax, which con-verts it into a white transparent glass. If exposed to heat madeby oxygen gas, it melts into a greyish white glass-bead. It isfound chieily in the sand at Ceylon, though some specimens havebeen obtained in various parts of the continent of Europe . Itwill take a fine polish, and when very pure is highly esteemed.
HYACINTHUS , Hyacinth, or Harebells; in botany,a genus of the hexandria monogyuia class and order. Na-tural order, Lilia Roy, or Liliaceai. Corolla beil-shaped, withthree honied pores by the germ. There are seventeen species.
I1YACINTHIA, in antiquity, feasts held at Sparta , in hornour of Apollo , and in commemoration of his favourite Hya-cinthus.
Hyactnthus, the son of Amyclas king of Sparta , was belovedboth by Apollo and Zephyrus . The youth shewing most inclina-tion. to the former, his rival grew jealous ; and to be revenged, oneday as Apollo was playing at the discus, with Hyachilhus, Ze-pbyrus turned the direction of a quoit which Apolio iiad pitchedfull upon the head of Ilyacinthus, who fell down dead. Apollo then transformed him into a dower of the same name ; and as afarther token of respect instituted the feasts of Iiyacinthia.
IIYADES, in astronomy, are seven stars in the bull’s head, fa-mous among the poets for the bringing of rain. Whence theirname 'ViiSis, from the Greek i5«v “ to rain.” The principal ofthem is in the left eye, by the Arabs called Aldebaran.
Hyades, in the mythology, the daughters of Atlas andPleione.
HY/ENA. See Canis.
HYALINE, glassy ; crystalline ; made
se mb ling glass.
1 - - - flinf rrprm<L Co*
HYALITE,
glass ;
, mineralogy, a species of the flint genus.
re-
_a Hindostan word signifying the presence
plied, by wav of eminence, to the Mogul’s court.
Huzzoor Neves, the secretary who resides at court, and keepscopies of all firmauns, records, or letters. - ,
HYACINTH, [WivS©-,] in mineralogy, a species of the zir-con genus •. of a red colour, which passes through various shadesinto orange yellow, greenish grey, and greenish white. It occursin grains, and likewise crystallized: specific gravity from 4 to 4 6.As these gems are of very different beauty and value in their se-veral degrees and mixture of colours, jewellers divide them intofour kinds: ]. When fine stone is in its most perfect state, and of apure and bright flame-colour, they call it liyacititha la belle. 2.When it has an over proportion ot the red, and that of a duskiercolour, they call it the saffron hyacinth. 3. Such stones as arc ofa dead whitish yellow, they call amber-hyacinths. And, 4. Whenthe stone is of a fine deep red, blended with a dusky and very deep
vol. in.— no. 109.
lour yellow and greyish white : it occurs in thin crusts on otherminerals, it much resembles gum, and is nearly allied to opal.
HYALOIDES, and uJ®.,] in anatomy, the vitreous
humour of the eye, between the tunica retina and the uvea.
HYB ERNACULUM, in botany, that part of the plant whichdefends the embryo herb from injuries during the severities ofwinter; hence the name, hybernaculum or winter-quarters. SeeBotany .
HYBLA, in ancient geography, a town on the E, coast of Si-cily , called also Iiyhla Parva, Galeotis, and Megara; whichlast name it took from the Megareans, who led thither a colony.
Hybla Major, in ancient geography, a town of Italy , in thetract lying between mount /Etna and the river Symethus.
Hybla Minor, or Helve, an inland town of Sicily , nowRagusa .
HYBLiEI COLLES, small eminences at the springs of theAlbus, near Hybla, famous for thyme and honey.
HYBRID/E PLANTiE, or HYBRID PLANTS. SeeBotany . The seeds of hybrid plants wfiU not propagate.
IIY BRISTICA, [of injury,] in antiquity, a solemn feastheld among the Greeks, with sacrifices and other ceremonies: atwhich the men attended in the apparel of women, and the womenin that of men, to do honour to Venus in quality either of a god orgoddess, or both.
IiYDATIDES, [from i5Aj§,] in medicine, little transparentbladders of water in any part: most common in dropsical persons,from, a distention or rupture of the lymphe ducts. They aresometimes found solitary, and sometimes in clusters, upon the li-ver and various other parts.
H YDATO!DES, [Wwj and the watery humour of the
eye, between the cornea and the uvea.
HYDATOSCOPIA, (jMw* and Caosa.-,’] a method of foretellingfuture events bv water.
R ‘ HYDE,