_An Addition to the Instances of _Petrification_, formerly enumerated. Articles of _Inquiries_ concerning _Mines_; as, to the neighbouring Country about them; the Soyl where they are; the Signes of them; the Structure and other particulars belonging to the Mines themselves; the Nature and Circumstances of _Ore_; and the Reduction of _Ore_ into _Metal_. Promiscuous _Inquiries_ formerly recommended to Monsieur _Heuelius_, particularly about _Cold_; together with his own, and his Correspondents _Answer_ to some of them. The success of the Experiment of Transfusing the Blood of one Animal into another._ * * * * * _An Addition to the _Instances_ of _Petrification_, enumerated in the last of these _Papers_._ _This _Instance_ was some while since communicated to the _Royal Society_ by that Ingenious Gentleman Mr. _Philip Packer_, a worthy Member of that Body; in these words;_ On a Bank in a Close of Mr. _Purefoy_, neer his house, call'd _Wadley_, a mile from _Farrington_ in _Berks_, there grows an _Elme_, which hath now lost the top, and is grown hollow, containing neer a Tun of Timber. From the But of the same Tree, one of the spreading Clawes having been formerly cut off with an Axe, that part of the But, from whence the same was sever'd, being about 11/2 foot above ground, and inward within the trunk {330} of the Tree, hath contracted a petrfied Crust, about the thickness of a _shilling_, all over the woody part within the Bark; the Marks of the Axe also remaining very conspicuous, with this petrified crust upon it. By what means it should thus happen, cannot well be conceived, in regard there is no water neer it; the part, above the ground and out of the weather; the Tree yet growing: unless being cut at some season, when the sap was flowing, the owsing of the sap might become petrified by the Air, and the Tree grow rotten and hollow inward since that time; which how long since, is not known. A piece of that part cut, was presented, together with this Account, to the said _Society_, for their _Repository_. * * * * * _Articles of Inquiries touching _Mines_._