who are defirous to have ocular proof of these phænomena; and will not be fatisfied with merely feeing, but will handle and break it.

A 1. A 2. are two faces of the fame mafs, ad is wood adhering to ftone, and of a dark brown colour, c is alfo wood; all the rest of the mafs is very firm ftone, b and e being the irregular end of different colours, which difference is not fo much the nature of the stone, as the accretion of dirt in the carriage: from b to f, where wood lay very thick, when the specimen was found, there are only thin filaments here and there adhering. The furface of A 2. is for the moft part wood, g is the appearance of the ftony part in the lower end.

Number III. INGENS LIGNO-SAXEA MOLES.

This ftone is as much as a strong man can carry, and is fo like the former, as to need no further defcription; being claffed here merely upon account of the place where it was found, about ten miles distance from the former, and in a river about two miles from the lake. The river is that in the maps which paffing through the town of Antrim, there enters the lake. When this fpecimen was found, the quantity of its wood, exceeded that of the ftone.

Number IV, V. DUE INGENTES LIGNO-SAXEE MOLES.

Thefe two fpecimens are claffed together, because they were one folid mafs, defignedly fplit with a fledge, in order to discover the inward texture, which is a mixture of very hard ftone and wood, together with fome of a brittle nature, fome more firm, and more approaching to the nature of stone: The external furfaces differ very little from the external appearance of the two former fpecimens; the ftony parts of these four laft fpecimens, are black. It should be remarked that this folid mass, bore above forty ftrokes of a fledge of 16lb. weight before it was fplit.

Number VI.

A fragment of a very large mafs, being as much as one horfe could draw, most of it wood, which breaking in the carriage, no more of it is referved for this collection, than about 50lb. which being heavier than weighty wood of the fame fize, denotes that there is ftony matter within, of which there is one part plainly difcerned, being continued to the furface, appearing very hard and fonorous upon the ftroke of a hammer.

Number VII.

This stone is near twenty inches long, and five broad; one fide is ground to a flat furface, is a firm black ftone, and gives a knife a good edge; the other fide is wood, and may be cut with that knife in feveral places, without spoiling the edge. N. B. There was a great quantity of wood, which was broke off in the grinding.

Number XX. LAPIS HOMOGENEUS.

This ftone is a fragment of a much larger ftone, altogether of one kind, hard and emitting fire plentifully even upon the friction of another ftone; fometimes water has been poured upon it, and in drawing another stone of the fame kind upon the furface with a quick motion, almost a line of fire has been made, the fparks came forth in fuch plenty. It is ground to four furfaces, which are good for whetting knives, but not equally excellent. Although it be altogether ftone, yet has it still the visible appearance of wood. The bending of the fibres. often seen in the grain of timber, being very discernible in it, as well as the rings of annual growth in the end. It is a mixture of the black and white kind of ftone, the white being worn away in feveral places, by grinding the furface. It weighs about 12lb.

Number XXI. A.

Another of the whetstone kind about five pound weight, having only one furface ground for that purpose. The circumftance mofst remarkable in this fpecimen is, that there appears one large straight fiffure,

Funning

running the whole length, which is fix inches, and the breadth, which is four, filled up with a lapidescent matter, which like glue feems to cement two ftones, rather than to carry on the continuity of the parts of one: And at each end there appears, befides this fiffure which extends the whole. length and breadth, other irregular fiffures, three at one end, two at the other, filled up in the fame manner; as if a piece of wood was by fome violent force fqueezed, fo as to cleave in feveral places, and was by an influx of lapidefcent matter, not only converted into ftone, but had all the cavities filled with it. When clean grained timber is violently fqueezed at the ends, or fides, efpecially when lying in heaps in the natural form of a tree which is round, it is very capable of cleaying: For there are infterftices, into which the unpreft parts may recede," till the whole mafs becomes close.

Number XXI. B.

This fpecimen is ground into a whetstone form, and has not only the white light gritty ftone externally, and the black ftone internally; but feveral treaks of iron ore, paffing quite through it lengthways: On one furface are two of thefe, which are the molt confpicuous, one is ftraight, the other a little curve: On the oppofite surface, they both are curve. This heterogene matter was collected here upon cleaving the wood as above defcribed.

Number XXII. XXIII. LAPIDES HOMOGENEI.

Two whetstones of the white kind; poffibly within there may be fome part black, but, although they be pretty deeply ground, nothing black appears except a little streak in one of them.

Number XXIV, XXV.

Two fragments of one long whetstone of the white kind, which was two feet long, two inches broad, and half an inch thick, being broken into several picces in the carriage: The internal texture is expofed to view, which is white like the furface, with a small ftreak of the black stone in each: Some parts rubbed in the carriage whiten the hand like chalk.