CHAP. VI. PROOFS, THAT THE SPACES WHICH VEINS NOW OCCUPY", HAVE BEEN FILLED FROM ABOVE. § 62. I now coma to the consideration of the proofs of the second grand proposition of my theory ; namely, the following. The inass of veins has been formed by a series of pre cipitations, which have filed in whole, or in part, the spaces now occupied by veins : these have entered by the superior parts of the rents which were open ; and have been furnished by a solution in water, generally chemical, which covered the country in which these rents then ex isted. I shall adduce only three proofs in support of this proposition ; and they will, I think, be sufficient to establish it entirely. I