68 Objervationi on. 



though a pound lump of that fame metal is fa 



long able to relift their violence. That thefe 



particles offcent are ofan equal (exactly equal) 



fpecificgravity with the particles of the air, is 



demonftrated by the falling and rifmg of them 



in juft proportion to it. I have often fmiled 



at haily Huntfmen, to hear them rating and 



curiing their dogs (thatyefterday were the beft 



in England) for galloping and flaring, with 



their nofes in the air, as if their game was 



flown ; for often does it happen that it is in 



vain for them to feek after the fcent in any 



other place, the increafing weight of that 



fluid element having wafted it over their 



heads. Though, even at fuch a feafon, after 



the firfl: mettle and fury of the cry is fome- 



thing abated, the more fteady Beagles may 



make a fhift to pick it out by the particles 



left by the brufli of her feet, efpecially if 



there be not a ftrong, drying, exhaling wind 



to hurry thefe away after the reft. This 



often happens in a calm, gentle, fteady froft, 



when, as I conceive, the purity, coldnefs, 



or, perhaps, the nitre of the air, ferves to 



fix and preferve the i^w remaining particles, 



that they do not eafily corrupt. At ano- 



tlier 



