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Show GR Some-are apt to lay Gravel Walks too round ; but this is likewife an Error, becaufe they are not fo good to walk upon, and befides, it makes them look narrow; an Inchis enough in a Crown of five Foot, and it will be fufficient, if a Walk be ten Foot wide, that it lies two Inches higher in the.Middle than it does on each Side; iffifteen Feet, three Inches; if twenty Feet, four; and fo in Proportion. For the Depth of Gravel Walks, fix or eight Inches may do well enough but a Foot Thicknefs will be fufficient for any. The Month of March is the propereft Time for laying Gravel; it is not prudent to do it fooner, orto lay Walks in any of the Winter Months before that Time. Some, indeed, turn up Gravel Walks in Ridges in December, in order to kill the Weeds, but this is very wrong ; for befides that it de- prives them ofthe Benefit of themall the Winter, it does not anfwer the Endfor whichit is done, but rather the contra y 3 for tho” it does kill the Weeds for the prefent, yet it adds a Fertility to them as to the great future Increafe of both them and Grafs. If conftant rolling them after Rains and Froft will not effectually kill the Weeds and Mofs, you fhould turn the Walks in andlay them downat the fame time. In order to deftroy Worms that fpoil the Beauty of Gravel or Grafly Walks, {ome re- commend the watering them well with Water, in which Walnut-Tree Leaveshave been fteep’d and madeverybitter, efpecially thofe Places moft annoy’dwith them; and this, theyfay, as foon as it reaches them, will make them come out haftily, fo that they may be gather’d; but if in the firft layi f the: Walks there is a goodBedof Lime-rubbith laid in the Bottom, It is the moft al Method to keepout the Worms; for they don’t care to harbour near Lime. Grounds that are gravelly and fandy, eafily admit both Heat and Moifture ; bur theyare not much the better for it; becaufe they let it pafs too foon, and fo contrac& no Ligature ; or elfe, if they have a clayey Bottom, they retain it too long, and by that Means either parch orchill too much, ar produce nothing but Mofs or cancerous Infirmities; but if the Bottom be a Gravel, and there are two Feet of good Earth upon the Surface, it is preferable to moft other Soils for almoft any Sort of Fruit; for tho’ this Soil will nor produce the Fruits planted thereon, fo large as aloamy Soil, y they will be muchbetter tafted , and Carlier ripe. GRAVITY, is by fome call’d Vis centripeta, and is that Quality by which all heavy Bodies tend towards the Cente r of the Earth, accelerating the Motionthe neare r they move towar it, ds iy ts alfo defin’d more generally, the natural Tendency of one Body towards another ; and byothers more gener ally till, the tu ei s T cncency Of Pe each Body, : and each artic cle le of a3 Body dy towar r dsal] othe t rs; andiin this Senfe it coincides with what is more ufually call’d Attraétion. The Terms Gravity, ; and Attraéfion, do, in effeé& » all1 denote the fame Thing, only in differen t Views and Re lations. In Propriety, G y EF e ¢ sity s or Gravitating Force, is wheny 2 confider a Bod y as tending towards the Ear Centripetal Force, is the e Force as the former, when we confider as immediately tending to the Centerofthe th. . , is the fame ler the Earth or Body towards w i Weight is the Name we give to it, when we é& to an Obftacle or Body, in the Way of its Tendency upon which as, It is a Law of Nature long obfery: all Bodies near the Earth, havea Gy Tendency towards the Center of the y the Moderns, and the immorta [ [aa I} found fromcertain Obfervations, to be much more extenfive, andto hold univerfally with refpect to allthe known Bodies in Nature. It is now therefore a Pri ciple, or Lawof Vature, that all Bodies, and all the Parti all Bodies, gravitate towards e From which fingle Prin Sir J 3 has happily deduc’d all the great Phoenomena vature, There is a two-fold Gravity of all Bodies, confidered within the Confines ofany Fluid ty, is the whole Force bywhich lownwa y in one Body above the Specifick Gravity of the Fluid, by which it tends downwards more than the ambient Fluid does. As to Abjolute Gr » the Fluids and all Bodies, do re their proper Places, and bytheir make the Weight of the Who heavy Whole is a heavy Body of any Whole is equal to the i Parts; becaufe compounded ofthen The Vulgar or Relati 7 i in reference to it, Bodies do not their Places, or rather do not when compar’d with one anot! hindring one another inthei to defcend, do remain in their as if they were not at all heavy, People in common Things which do not Pr Water, >. SC. &c. have no Gri conclude thofe to be heavy Bodie fee pregravitate or defcend, | not be born up by the. c of the Fluid, or byits Prefi Ways: So that amongthe the Notion of Wei J the Weight of any “Body above and thofe Thi becaufe they are s he: borne or buoy’d up byits |
