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Show HY whatever Bodycither fwells or fhrinks by Drinefs or Moifture, is capable of being form d into an Hygrometer, fuch are Woods of mot Kinds, particularly <b al, Pop. &e, fuchalfo is a Co Stretch a Hempen-cord 1g along a Wall, bringing it over a Truckle or Pulley, and to the other End tiea Weight, unto whichfit a Style or Index, on the fame Wall fit a Plate of Metal divided into any Number of equal Parts, and the Hygrometeris Thefe Inftruments are of good Uf in Confervatories for meafuringor fhewing the Dampnefs or Drinefs of them in the W inter-feafon, HYOSCYAMUS, [of us a Swine, and xJap@ a Bean, q.d. Hog’s-bean; andit is fo call’d becaufe its Fruit refembles a Bean; and as Zilianus relates, when wild Sows have eaten ofthe Lyo/c s, they are immediatelyfeiz’d with a violent Convulfion, fo that they die, unlef they throwthemfelvesinto Water, where, eating the Crab-fifhes, they are reftor’d to their compleat. For it isa Matter of undoubted Obfervation, former Health.} Hen-bane. The cb fers are; that Moifture fenfibly fhortens the Length of Cords and Strings, and that as the Moifture wate The Leaa t evaporates, they return to th former Length ; and the like maybe faid ofa Fiddleftring. The Weight therefore, in the prefent Cafe, uponan Increafe of the Moifture of the Air, will afcend; Bika cond Summer they will produce Flowers and Seeds, and foonafter the Roots perifh. HYPERICUM; “T reeinar, g.d. an Herb, the Image of which is eminent, or becaufe it has refpect to, or beholds the Sun.) St. John’swort. the propagated by fowing the Seeds in March upon cup confifts of one Leaf, which is divided ive Parts, and expanded; the Flower, ts of five Leaves, expands in Form a Bed of light Earth in an open Situation ; and when the Plants are large enough to be tranfplanted, they may be plac’d in the warm Borders of the Pleafure-Garden, and the Sum~ mer following they will produce their Flowers in large Quantities upon the Tops of thé Branches, which being of a large Size, anda bright yellow Colour, do make a very handfome Shew. which becomes a 1 is dividedinto The Species are ; mon St, John’s-wort. z. Hypericum; Afcyron quadrangulo. FB. HYPERICUM FRUTEX ; vide Spirea. St. John’s-wort, with a equal to the Increments and Decrements of {quare Stalk, commonly call’d St. Peter’s-wort. the Length of the Cord or Gut, the Inftrument wil! difcover whether the Air be more or Stinking, fhrubby St. John’s-wort. 3. Hypertcum ; fatidum,frute/cens. Tourn. Tefs humid now, than it was at another given x The ordinary Contrivance with Whip-cord, is one of the eafieft; for that will infallibly fhorten and lengthen as the Air grows moifter anddrier, Some recommend a Cat-gut as the beft, which may be a Yard in Length, fufpended, having a Plummet or Piece of Lead, with an Index or Pointer, hanging at the lower End, by of which the Cat will twift or un the Air dries or moiftens, and fhorten and Jengthen fo as to raife and fink the Plummet with the Index ; and this Index will point out the Degree fought for. The Weight of this Lead or Plummet fhould be about two Ounces Some Perfons, who approve a fine Whipcord inftead of Cat-gut, ufe a greater Weic of Lead: The Twifting and Ur the Cat-gut or Whip-cord wil } ac with the Index turn round, as well as rife and fall: The Degrees may be made upon an open Skrewof Brats within, with which the Plummet and Index has its Motion. When youare provided with a Barometer and Hygrometer, compare the Motions of the one with the other, in orderto judge what Proportion the Rife or Fall of the Quickfilyer in the Barometer bears to the twifting of the Cat-gut or Whip cord; the Degrees of which Motion may be oblerv’d bythe Index or Poin- ter of the Hygrometer, and at the fame Time both thefe muft be compar’d with the Rifing andFalling ofthe Spirit in a There meter, to Xnow what Degree of Heat or Cild attends every different Change of Weather. HYGROSCOPR, [of!y.6 moift, and snot sO view or Confider) a Machine the fame as the Hygrometer, and for the fime Us. oD) ts vel tertius S Plinii. C. B. P. Greater jor, albo fimilis, us 10 ro-purpureo, Z.Cor. Great Hen= bar Vhite, but with a dark Purple Bottomto the Flower, Hy ; minor, albofimilis, wm Leffler Hen-bane en Bottom to the 5. Hyoscyamus ; len-bane, with a rec 6. Hyoseya ; Gea PCr There are feveral Plant, which are prefe 1ick Gardens, _ to add to their Numbers of Plants; but fince they are rarely cultivated for Ule, fo I fhall forbearto fay anything of them in this Place. The firft of thefe Sorts is very commonin England, growing upon the Sides of Banks and old Dun ls almoft every where. I hisis av poifonous Plant, and fhould be rooted out in Places where Childrenare fufferdt come ; for in the Year 1729, there were three Children poifon’d with eating the Seeds of this Plant, near Zottenham-C two of which flept two Days and two Nights before they could be awaken’d, and were, recover'd; but the third, with Difficulty, by being older and ftronger, efcaped better. The fecond Sort is by moft Authors fuppos to be the true white Hen-bane of the Shop the Seeds cf which fhould be us’d in Mediciné, tho’ there is very little Difference in the See fthat andthe third andfourthSorts, eith¢ which mayprobablydo. ‘The otherSorts i no Ufe or Beauty; € awe ny ofthef f upon Roots, and planting Cuttings in the Spring ; y Pairs at the Joints of the Stalks ; The Charaéfersare ; 1. Hypericum ; vs Time. Leaves, when bruis’d, do emit a very rank Odour. The Eaftern Sort is alfo an abiding Plant, but it feldom rifes above eighteen Inches or two Feet high: ‘This is propagated byparting the It bath a fibrofe Root ; the Leaves grow op- three Cells, containing me and upon a Diminution of the tinue flowering until the End of September, which renders them very agreeable, but their it is fomewhat tenderer thanthe laft, but will endure the Cold of our ordinary Winters in the open Air, provided it be not too much expos'd to the cold Winds: It may alfo be tamina im the Center Hence as the Index will fhew the Spaces of Afcent and Decent, and thofe Spaces are : “ 7 VTSChey dung’d Soil: And whenthe Plants are come up, they fhould be tranfplanted out, allowing them two Feet Diftance each Way: The fe- ry, fame, will defcend. waa FAL) HtY d 4. Hypericum ; fratefcens, Canarienfe2, multiflorum. Hort. Amt. ShrubbySt. John’swort from the Canaries, with manyFlowers. 5, Hypericum ; Orientale, flore 0. T.Cor. Eaftern St: John’s-wort, with a large Flower. The firft and fecond Sorts are: both very common Plants, growing in the Fields in moft Parts of England ; the firtt is us’d in Medicine, but the fecondis of no Ufe : Thefearerarely propagatedin Gardens, but I chufe to mention them in order to introduce the other Sorts) which deferve a Placé in every good Garden. The third and fourth Sorts are fhrubby Plants, which are very proper to intermix with other flowering Shrubs of the fame Growths, where, by their long Continuance in Flower, they will make a very handfome Appearance. The third Sort is of an humble Stature, feldom rifing above four Feet in HYPOPHYLLOSPER MOUS Plants; [of vad under, ovary a Leaf, and eat:ua Seed] are fuch Plants as bear their Seeds on the Backfides of their Leaves. HYSSOPUS, [takes its Name from the Hebrew Word 2%, in which Language Hy/fop fignifies an holy Herb, or for purging of cleanfing facred Places, as it is faid in the Pfalms, Purge me with Hyffop ; but what Plant the Hy/Jop of the Antients was, is not known ; but that it feems to have been a lowPlant, becaufe Solomon is faid to have defcrib’d the Plants from the Cedar to the Hy/fop.] Hyflop. The Charaéfers are ; It is a verticillate Plant, long, narrow Leaves ; the Galea (or Creft) of the Flower is roundifo, erect, and divided Barba (or Beard) is di intotwo Parts; the d into three Parts ; the middle Part is bollow'd like a Spoon, having, @ double Point, and is fomewhat wing’d; the Whorles of Flowers are fhort, and at the lower Part of the Stalk aré plac’d ata great Diftance, but the fourth will grow to the but towards the Top are clofer joiu'd, fo as to Height of fevenor eight Feet. forma regular Spike. Thefe two Sorts are propagated by Suckers, The Species are ; which are plentifully fent forth from theold 1. Hyssopus ; officinarum, carulea, feu }piPlants. The beft Seafon for taking off thefe cata. C.B. P. Common Hy/fip of the Shops, Height; Suckers is in March, juft before they begin to thoot : Theyfhould be planted in a light dry Soil, in which they will endure the fevereft Cold of our Climate very well. They may alfo be propagated byCuttings, which fhould be planted at the fame Scafon ; or by Seeds, hich muft be fown in Augu/t or September, which is as {oonasthey’re ripe; forif they ard Kept till Spring, few of them will grow: But y multiply fo faft by Suckers, the other Methods of propagating them are feldom Practis’'din } igland. The only Care thefe Shrubs require, is, to clear them from Suckers ev Spring, and to out all decay’d and luxuriant Branches, in T to reduce them to a regular Figure: ‘hey produce their Flowers in Fulyy and cons with blue Flowers growing in aSpike. 2. Hyssopus ; vulgaris, alla. C. B. P. Common Hy/fop, with a white Flower. 3. Hyssopus ; rubro flore. C.B.P. Hyffops witha red Flower. 4. HyssoPus ; montanum, Macedonicumy Valerandi Dourez. 7. B. nian Hy/fop. 5 E Par. 5 Mountain Macedo- bumilior, myrt Dwarf Myrtle-leav’d Hy/fop, HA. R. All the Sorts of Hy/fop are propagated either by Seeds or Cuttings : If by the Seeds, they miuft be fown in March upon a Bed of light fandy Soil ; and when the Plants come up, they fhould be tranfplanted out to the Places where they are to remain, placing theni ar leaft a Foot afi éach way: But if they are |