VOL. XXIV.] PHILOSOPHICAL TRANSACTIONS. l6g 



Georg. Joseph. Camelli De Plantis Philippensibus scandentibus ', Pars Ida, 

 Ad Jacobum Petiver, S.R.S. nuper transmissa,, N° 294, p. 1763. 



A continuation of the catalogue of plantae scandentes (climbing plants) grow- 

 ing in the Philippine isles. ,!( > 



Concerning some Fossils of Switzerland, &c. By Mr. Leuwenhoeck, F.R.S. 



N°294, p. 1774. 



Having imparted my thoughts and observations to M. Valkenier, about 

 mountain-crystal, and particularly that it was not produced from ice, nor grew 

 in the mountains, where it has its increase, as many are of opinion; but that 

 it is coagulated of the air, where it is fixed in the mountain; that air and a 

 little moisture is shut up in crystals; the parts of which being separated, arc 

 again resolved into long particles, of which a great many are hexangular, that 

 gentleman gave me four small snail-shells, which he had gathered in the 

 mountains, where through length of time they were changed into metal, for 

 they were uncommonly heavy. For further satisfaction, I took one of the 

 snail-shells, that I judged to be metal, and beat it to pieces with a hammer; 

 but finding that it broke very easily, I separated the parts with the less trouble, 

 and broke the fore- part with my fingers, a small part of which, represented by 

 fig. 22, pi. 6, I placed before a microscope, of which bcd was what was joined 

 to the fore-part of the snail-shell, and in which I observed 6 prominent par- 

 ticles, and 5 others at ae, which were fitted or insinuated into the 6 particles, 

 and as often as I broke the shell in pieces, I still observed in the fore-part 6, 

 and in the hind-part 5 particles, in the same order and disposition ; so that I 

 fancy it must have been a limb or part of the inclosed snail, and consequently 

 that it had been once a living animal. 



Having placed the broken part of one of these little pieces of snail-shell before 

 the microscope, I observed that the internal matter was composed of very small 

 shining particles, which one would take to be broken pieces of metal. As I 

 have seen particles of metal apparently similar, but which were really nothing 

 but brimstone, I took some of the small pieces of the shell, and put them into a 

 glass, and then upon the fire, when I observed, that in proportion to thesmall- 

 ness of the parts, a great deal of water and sulphur was extracted from them, 

 without discovering the least sign of metal in the remaining black matter. 



I examined also that small piece of matter, which I judged to have been the 

 living animal within the shell ; by its uncommon weight it seemed to be also 

 turned into metal, and the more when I had broken it to pieces, for then the 



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