Thus, in a letter of Hartlib's to Boyle of April 12, 1659, there is this from Oldenburg's last: "I have had some discourse with an able but somewhat close physician here, that spoke to me of a way, though without particularizing all, to draw a liquor of the beams of the sun; which peradventure some person that is knowing and experienced (as noble Mr.Boyle) may better beat out than we can who want experience in these matters." Young Ranelagh seems to have fully acquired by this time the tastes for physical and experimental science which characterized his tutor; and his uncle Boyle may have read with a smile this from Hartlib of date October 22, 1659:--"This week Mr.Jones hath saluted me with a very kind letter, containing a very singular observation in these words: 'Concerning the generation of pearls I am of opinion that they are engendered in the cockle-fishes (I pray, Sir, give me the Latin word for it in your next) of the same manner as the stone in our body,--which I endeavour fully to show in a discourse of mine about the generation of pearls; which, when I shall have done it, shall wait upon you for my part in revenge of your observations.

I heard lately a very remarkable story about margarites from a person of quality and honour in this town, which you will be glad, I believe, to hear.

A certain German baron of about twenty-four years old, being in prison here at Paris, in the same chamber with a Frenchman (who told this, as having been eyewitness of it, to him that told it me), they having both need of money, the baron sent his man to a goldsmith to buy seven or eight ordinary pearls, of about twenty pence a piece, which he put a-dissolving in a glass of vinegar; and, being well dissolved, he took the paste and put it together with a powder (which I should be glad to know) into a golden mould, which he had in his pocket, and so put it a-warming for some time upon the fire; after which, opening the mould, they found a very great and lovely oriental pearl in it, which they sold for about two hundred crowns, although it was a great deal more worth.

The same baron, throwing a little powder he had with him into a pitcher of water, and letting it stand about four hours, made the best wine that a man can drink.' Thus far the truly hopeful young gentleman, whereby he hath hugely obliged me.

I wish he had the forementioned powder, that we might try whether we could make the like pearls and wine." From a subsequent letter of Hartlib's, dated Nov.