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Hydrophilus Piccus

or Water-Chock.

Lendin Neblished by Cirandy Flet Set 42. 24.

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Man, a philosophical work, on the same clusters on the leaves of the plants, each placed ground as his first performance. 3. The on a small gummy, pedicel. Many of the Child of Nature improved by Chance, an in- species when touched have an excrementitious decent romance. (Watkins).

smell. The colour varies much; that of the HELVOETSLÙYS, a seaport of Holland, body is chiefly yellow, brown, or black, or on the island of Voorn. It is the place of intermixed, sometimes greenish: the winga destination of the English packets from Hare are often white. Some of the species are wich. Lat. 51. 45 N. Lon. 4. 23 E.

smaller than the common louse; several of HEM. s. (hem, Saxon.) 1. The edge of them resemble the termes, and perhaps might a garment doubled and sewed to keep the as well be included under that genus : whence threads from spreading (Wiseman.) 2. (hem- the hemerobius of Fabricius comprises a mer, Dutch.) The noise uttered by a sudden whole tribe of the genus Termes, which see. and violent expiration of the breath (Add.) 3. See also Nat. Hist. Pl. CXXXI. Interject. HEM! (Latin).

HEMEROCALLIS. Day-lily. In botany, To Hem. v. a. 1. To close the edge of a genus of the class hexandria, order monocloth by a hem or double border sewed to- gynia. Corol campanulate, with a cylindrical gether. 2. To border; to edge (Spenser.) 3. tube; calyxless; stamens declining. Four to enclose; to environ; to confine; to shut species; one a native of Switzerland, the (Fairfax).

other three of China and Japan. To HEM. v. n. (hemmen, Dutch.) To 1. H. flava. yellow day-lily or lily aspodel. utter a noise by violent expulsion of the Leaves linear; segments of the corol Aat acule, breath.

with their nerves undivided. This is the HEMATITE. See HÆMATITEs.

Swedish plant. HEMERALOPIA. (hemeralopia, mepesa 2. H. fulva. Tanny day-lily; neres of istie, from musepcen a day, and onlw, to see.) the outer segments branched ; a native of Crepusculary blindness. A defect of vision, China. in which the patient sees perfectly well all day, 3. H. lancifolia. Lance-leaved day-lily; but in the crepusculary light, as in the evening, leaves oblong, tapering to both ends, sevenperceives little or nothing. It is often endemic nerved, to China, Barbadoes, the Brazils, and Poland. 4. H. Japonica, with roundish ovate leaves,

HEMERALOPS. (hemeralops, nespaawat, pointed, many nerved. Indigenous to Japan, from spazza, the day, and wit, an eye), One and producing in our own green-houses beauwho can see but in the daytime, or when the tiful white flowers. sun is in full strength.

Of this last species there is also a beautiful HEMEROBAPTISTS, a sect among the variety, affording blue flowers. See Nat. ancient Jews, thus called from their washing Hist. Pl. CXXXV. and bathing every day in all seasons; and per- The two first are the most common, and forining this custom with the greatest so- obtained with most facility. Of these two the lemnity, as a religious rite necessary to sal- former is easily propagated by off-sets, which vation. Epiphanius, who mentions this as the roots send out in abundance; these may the fourth heresy among the Jews, observes, be taken off in autumn (that also being the that in other points these heretics had much best season for transplanting the roots) and the same opinions as the Scribes and Pharisees; planted in any situation ; for, being extremely only that they denied the resurrection of the hardy, they will require no other culture than dead, in common with the Sadducees, and to be kept clean from weeds, and be allowed retained a few other of the improprieties of room to spread their roots. This sort may be these last.

propagated also by seeds, which, if sown in HEMEROBIUS. In zoology, a genus of autumn, will produce plants the spring rolthe class insectæ, order neuroptera. Mouth lowing, and these will flower in two years; with a short, horny mandible; the jaw cylin, but if the seeds be not sown till spring, the drical, straight, cleft; feelers four, unequal, plants will not come up till the year after. bliform; without stemmata, or eyes on the The second species is usually propagated by erown ; wings deflected, not folded ; antennas parting the roots : the proper season for this is setaceous, projecting, longer than the thorax, autumn, as also for transplanting the roots. which is convex. Thirty-eight species; which These plants should not be transplanted may be thus subdivided :

oftener than every third year, when the roots A. Lip cylindrical, membranaceous

, annu. may be parted to make an increase of the late; comprising the Fabrician tribe plants; but they must not be divided too semblis.

smali, for if they be, it will be two years B. Lip horny, rounded at the tip, vaulted. before they flower. They delight in a light

Soine of the different species are common to loamy seil, and an open exposure. all the quarters of the globe : cight of them HEMERODROMI, compounded of nursa, found in our own country. Like the ephe- day, and spopeo, course, &c. among the meræ, these insects are very short-lived; and ancients, were sentinels or guards appointed in every state of their existence prey with un- for the security and preservation of cities ceasing avidity upon plant-lice: the larve is and other places. They went out of the city six-footed, generally ovate and hairy; the pape, every morning, as soon as the gates were mostly folliculate; the eggs are deposited in opened, and kept all day patrolling round the place; sometimes also making excursions afectus half, and wt, an eye.) A defect farther into the country, to see that there were of vision, in which the person sees the half, no enemies lying in wait to surprise them. but not the whole of an object.

HEMERODROMI were also a sort of couriers HEMIPLEGIA. (hemiplegia, mutta nyeng among the ancients, who only travelled one from mous, half, and accou, to strike). day, and then delivered their packets or dis- A paralytic affection of one side of the body. paiches to a fresh man, who ran his day, and See Paralysis. so on to the end of the journey.

HEMIPTERA. In zoology, the second HEMEROTROPHIS, iú antiquity, a order of the class insecta consistently with the measure of capacity, the same with the Linnéan system, thus ordinally characterised : chønix. It was so called from its holding mouth and snout beat in towards the breast; one day's food. The word is compounded of upper wings soft semi-crustaceous, not divided mptes per a day, and spoon food.

by a straight suture, the base of the left HEMI, a word used in the composition of covering the inner margin of the base of the various terms. It signifies the same with semi right. See ZOOLOGY. or demi, viz. half; being an abbreviature HEMISPHERE. s. (muusopeespiov.) The half of mourous, hemisys, which signifies the samie, of a globe, where it is supposed to be cut The Greeks retrenched the last syllable of the through its centre in the plane of ope of its word neisus in the composition of words; and greatest circles (Dryden). after their example, we have done so too in HEMISPHEREs separated by different great most of the compounds borrowed from them. cireles on the mundane sphere are cha

HEMICRANIA. (hemicrania, npassepovic, racterised by different names. Thus, the from pelous, half, and xperior, the head). equator separates the northern and southern A pain that affects only one side of the terrestrial "hemispheres; the ecliptic, the head.

northern and southern celestial hemispheres ; HEMICYCLE, HEMICYCLIUM, in archi- the first meridian, the eastern and western tecture, a term applied to semicircular vaults. hensispheres; and the horizon, the upper and · HemICYCLIUM was also a part of the louer hemispheres. orchestra in the ancient theatre. Scaliger, HEMISPHERES OF MAGDEBURGH, Iwo however, observes, it was no standing part of brass concave hemispheres, one of which is the ochestra; being only used in dramatic furnished with a cock, by which it may be pieces, where some person was supposed to be adjusted to the air-pump. The other has a arrived from sea, as in Plautus’s Rudens. The ring at the middle of its convexity, by means ancients had also a sort of sun-dial, called of which it may be suspended. When these hemicyclium. It was a concave semicircle, two hemispheres are placed together, the air the upper end or cusp whereof looked to thé is drawn from within through the inedium north.

of the cock by the mechanism of the air-pump; HEMIDITONE, in ancient music, the and then, the exhaustion being carried far interval of a major-third diminished by half a enough, and the cock turned to prevent the tone: its constituting ratio is 5:6.

admission of air from without, a considerable HEMIMERIS. In botany, a genus of the force is requisite to separate the hemispheres : class didynamia, order angiospermia. Calyx the force varying with their external surface; five-parted; corol wheel-shaped, reversed, This furnishes an easy and obvious method of gibbous at the base, cloven; filaments glabrous; proving the force and pressure of the air. capsule two-celled. Five species; three natives Otto Guericke, the inventor of the air-pump, of the Cape, two of South America : all to whom also is due this invention, made herbaceous plants; the two last with beautiful hemispheres of about a foot radius, and found : scarlet flowers.

that the atmospheric pressure upon them was HEMINA, formed of spious, half, a vessel equivalent to about 5400 pounds. used as a measure among the ancient Romans, HEMISPHERICCALYX, or NCTARY. containing half the sextary. The hemina, In botany. In form of half a sphere. The first called also cotyla, and acetabulum, contained exemplified in tanacetum : the second in nareight ounces of liquor; and was about half cissus jonquilla. our wine pint.

HEMISPHEROIDAL, in geometry, HEMIOBOLON, in antiquity, a weight something that approaches to the figure of a of half the obolus, or five grains.

hemisphere, but is not justly so. HEMIOLUS, or HEMIOLIA, among an- HEMISTICH, compounded of meeting cient musicians, denotes that ratio which we half, and sexos, verse, in poetry, now call SesQUIALTERAL.

HEMIONTTIS. In botany, a genus of Such, e. gr. are, Cernit Deus omnia vinderthe class cryptogamia, order filices. Fructifi

or Medio tutissimus ibis, &c. cation in decussate, forked, or reticulate lines; It is disputed, whether or no the hemistichs involucreless ; six species, three with simple in the Æneid were left with design; or wheand three with compound frond: natives of ther they are owing to the work's being unthe East or West Indies.

finished ? HEMIOPE, a kind of fistula, having three In English, &c. the common and Alex. holes, used by ancient musicians.

andrine verses require a rest at the end of HÉMIOPSIA. (hemiopsia, mesofice, from each hemistich; common verses require it at

a half


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