PHILOSOPHICAL
TRANSACTIONS.
Monday, November 6. 1665.
The Contents.
An Account of a not ordinary Burning Concave, lately made at Lyons, and compared with several others made formerly. Of Monsieur Hevelius his promise of communicating to the World his Invention of making Optick Glasses; and of the hopes, given by Monsieur Christian Hugens of Zulichem, to perform something of the like nature; as also of the Expectations, conceived of some Persons in England, to improve Telescopes. An intimation of a way of making more lively Counterfeits of Nature in Wax, then are extant in Painting; and of a new kind of Maps in a low Relievo, or Sculpture, both practised in France. Some Anatomical Observations of Milk found in Veins instead of Blood; and of Grass found in the Wind-pipes of some Animals. Of a place in England, where, without Petrifying Water, Wood is turned into Stone. Of the nature of a certain Stone, found in the Indies in the head of a Serpent. Of the way, used in the Mogol's Dominions, to make Salt-petre. An Account of Hevelius his Prodromus Cometicus, and of some Animadversions made upon it by a French Philosopher; as also of the Jesuit Kircher's Mundus Subterraneus.
An Account of a not ordinary Burning Concave, lately made at Lyons, and compared with several others made formerly.
An opportunity being presented to revive the publishing of these Papers, which for some Moneths hath been
discontinued by reason of the great Mortality in London, where they were begun to be Printed; it hath been thought fit to embrace the same, and to make use thereof for the gratifying of the Curious, that have been pleased to think well of such Communications: To re-enter whereupon, there offers it self, first of all a Relation of an uncommon Burning-glass, not long since made in France, in the City of Lyons, by one called Monsieur de Vilette, as it was sent to the Publisher of these Tracts, in two Letters, whereof the one was in Latine, the other in French, to this effect.