body, which might by others be called a crystal, is here denominated as above: Because having cut and broken it into feveral blocks for mechanical ufes, which fhall be related hereafter, it has a finer luftre and is harder than thofe brought from abroad, or found in other parts of this kingdom, and therefore deferves an intermediate name between crystal and a diamond. Number CCLXVIII. Another Pfeudo Adamas weighing half an ounce, of an orbicular shape, and covered with an opaque fcurf; as hard as the former and of as fine, or finer a luftre: For the opinion of artists differ. Number CCLXIX. A Mocoa weighing one pound, extremely rough and irregular in the furface, fo uninviting to the fight in its external appearance, that if the accidental breaking of it in a place where other ftones were handled, had not difcovered the inward beauty, it would not have been lifted. The beauty of this stone shall be described in the phyfico-mechanical lecture. Number CCLXX. A Carnelian, weighing three quarters of a pound, of an oval form, exactly appearing externally like raw flesh, as Caro the origin of Carnelian denotes; it polishes to great beauty as shall be explained in the phyfico-mechanical lecture. Number CCLXXI. Another Carnelian, being a fmall fragment of a much greater mass, is only a quarter of a pound weight, of a pure amber colour without any appearance of flesh---The uses of this are told in the phyfico-mechanical lecture *. *N. B. The foregoing catalogue is given honeftly, tho' not very regularly, (and the crystals and agats fhall be defcribed in the phyfical, and phyfico-mechanical lecture) In this catalogue, regard was had to a noble precedent the Royal Society, fee their history page 115. by the Bishop of Rochester. The Society has reduced its principal obfervations into one common stock; and laid them up in public regifters, to be nakedly transmitted to the next generation of men; and fo from them, to their fucceffors. And as their purpose was, to heap a mixt mafs of experiments, without digefting them into any perfect model; fo to this end, they confined ⚫themselves to no order of fubjects; and whatever they have recorded, they have done it not • as complete schemes of opinions, but as bare unfinish'd histories. Phænomena of LOUGH NEAGH, With regard to places and ftrata of matter, whether Lake or River or Springs, Land or Water, deep or fuperficial. LE Ad quæ nofcenda iter ingredi, tranfmittere mare folemus; ea fub oculis pofita negligimus: feu quia ita naturâ comparatum eft, ut proximorum incuriofi, longinqua fectemur: Seu quod omnium rerum cupido languefcit, quum facilis occafio eft; feu quod differimus, tanquam fæpe vifuri quod datur videre, quoties velis cernere. Quacunque de caufà, permulta in urbe noftrâ juxtaque urbem non oculis modo, fed ne auribus quidem novimus: Quæ fi tuliffet Achia, Ægyptus, Afia, aliave quælibet miraculorum forfan commendatrixque terra, audita perlecta luftrataque haberemus; ipfe certe nuper quod nec audieram antè, nec videram, audii pariter et vidi &c. Plin. Epift. Gallo fuo lib. 8. Goldsmiths that only give shape and luftre to gold, are far more esteemed, and in a better condition than miners, who find the ore in the bowels of the earth, and with great pains and industry dig it up, and refine it into metal: So those that with great ftudy and toil fuccefsfully penetrate into the hidden receffes of nature, and difcover latent truths, are ufually lefs regarded, than those who reduce the truths, that others have found out, into systems. Boyle's Excellency of Theology compared with Philofophy. In hoc gaudeo aliquid dicere ut doceam: Nec me ulla res delectabit, licet eximia fit et falutaris, quam mihi uni fciturus fim. Si cum hac exceptione detur fapientia, ut illam inclufam teneam, nec enunciem, rejiciam. Senec. Ep. 6. La curiofité n'eft que vanité. Le plus fouvent on ne veut fcavoir que pour en parler. On ne voyageroit pas fur la mer pour ne jamais en rien dire, et pour le feul plaifir de voir, fans efperance de s'en' entretenir jamais avec perfonne, Pafch. Vanité de l'homme. N T HE foregoing lectures were not read, because the Gentlemen were: impatient to be made acquainted with the difcoveries, The addrefs therefore used upon that occafion, and immediately before: the reading of this lecture, is printed alfo immediately before it.. For fome readers will rather chufe to pafs over the principles, or take them for granted, than be detained by ftrictness of demonftration from grati fying an eager curiofity. Yet to fuch, the INQUIRER recommends: the previous reading of the lecture of metamorphofes, that being absoTutely neceffary to Readers, tho' not fo, to Spectators.. |