I have one single Luserne-plant in a poor Arable Field, that has stood the Test of Two-and-twenty Winters, besides the Feeding of Sheep at all Seasons, and yet remains as strong as ever. What Quantity of Hay this Plant yearly produces, cannot be known, because at those times that Cattle are kept from it, the Hares constantly crop it, being sweeter than any other Grass. But this happens to be fortunately situate, where ’tis not altogether destitute of the Benefit of Hoeing. ’Tis in an Angle, where, every time the Field is till’d, the Plough goes over it in turning from the Furrows of one Land and one Head-land; but it is after the Plough is lifted out of the Ground, and turned up on one side, so that the Share only breaks the Turf very small all around it, without plowing up the Plant: Yet it has escaped it so narrowly, that the Fin of the Plough-share has split it into Four Parts; Three of which remain, and grow never the worse, but the Fourth is torn off, and the Wound healed up. By the extreme hard Winter that happened about the Year 1708, or 1709, some of the Luserne in _Languedoc_ was killed: Yet this was no Argument of its Tenderness, but rather the contrary; because then all the Olive-trees and Walnut-trees were there killed, tho’ the greatest Part of the Luserne escaped unhurt: And I did not hear one Walnut-tree was killed that Winter in _England_. Perhaps those in _France_, having being accustomed to much hotter Summers, were unable to endure the Rigour of the same Winter, that could do no Harm to the same Species in _England_, where our Winters do not seem to exceed some of theirs in Cold, so much as their Summers do ours in Heat. And since the Extremes are not so far asunder here, the same Degree of Cold may to our Plants seem tepid, which to those in _Languedoc_ must seem rigorous, differing a more remote Degree from the opposite Extremity of Heat in Summer. And, besides the Difference of Heat and Cold in different Climates, there is another more necessary to be observed; and that is, the Difference of the Hardiness in different Individuals of the same Species: The same Frost that kills a faint languishing Plant of Luserne, will be despised by a robust one, which, being well fed by the Hoe, becomes a Giant cloath’d and fenced with a thick Bark, that renders it impregnable against all Weather; its Rind is to it a Coat of Mail or Buff, impenetrable by Frost: But the unhoed is generally small and weak; its thin tender Bark exposes it almost naked to the Frost; it being, for want of a sufficient Pasture, starv’d and half-dead already, ’tis the more easily killed by the Cold.