A refutation of Mr. Henry's strictures on Glass's magnesia; supported by a series of experiments ... To which is annexed, a recommendatory letter from ... Doctor Huxham / By the present proprietor of Glass's magnesia [P. Delamotte].

  • Delamotte, P.
Date:
1774
Catalogue details

Licence: Public Domain Mark

Credit: A refutation of Mr. Henry's strictures on Glass's magnesia; supported by a series of experiments ... To which is annexed, a recommendatory letter from ... Doctor Huxham / By the present proprietor of Glass's magnesia [P. Delamotte]. Source: Wellcome Collection.

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    ^ cefs, and was at laft fo fortunate as to obtain : >sc fome ufeful hints. I availed myfelf of thefe; a and after repeated trials, produced Magnesia i equally pure, white, taftelefs, light, and impal- 6C pable, with that of Mr. Glass nay, fometimes i “ that of my own preparing has been fuperior to : “ his, and in one refpebi has generally the advan- u tage of it, namely, that mine is not fo ft iff when i “ dried, and may be reduced to the flneft powder a by fimple prefllire ; whereas his requires fome tc degree of trituration to break the lumps eflfec- 6< tually.” So far Mr. Henry. The fa£t is briefly thus :— About fourteen years ago Mr. Henry lived as journeyman to an apothecary in the neighbourhood of Mr. Glass *, and however earneftly difpofed he might have been to fteal from the original Inven¬ tor and Proprietor the fecret and fruits of his dif- covery, yet it was abfolutely impoflible for him to havje acquired a Angle hint. Mr. Glass having ever kept his lips and his laboratory clofe fhut up from all the world •, and as for tampering with fer-* vants, (the only method Mr. Henry could think of in that cafe) Mr. Glass was fo cautious as to em¬ ploy fuch fervants, and in filch parts of the work only, as fhouid neceflarily preclude all poflible dis¬ covery of fo valuable a fecret, let the inquisitive Invader be ever fo artful or unprincipled. If therefore Mr. Henry produced Magnesia equally pure, white, taftelefs, light, and impalpable, with that of Mr. Glass, the merit was entirely his o\Vn : Whether he did or not, will be made appear. By this time the candid and judicious Reader, I doubt not, begins to perceive the complexion of this