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IV* Aft Account of (i Saak entituled \ Piodrom us 
Cryftallographiae. De Cryftallis improprie 
fic ditSlis Commentarium. A Mauricio An- 
tonio Cappeler, M. D. &c Centumviio Lu- 
cernenfi. Lucernae 1715. 40. ®y J. Q, 
Scheuchzer, M. D. Coll. Med. Lond. Lie. % S. S. 
\ r \ * 
T HE Author of this Treatife takes notice in the 
Preface, that it is only a final! Part of a larger 
Work, which he promis’d the Publick fome Years ago, 
under the Title of Cryftallographia, and hath now 
almoft ready for the Prefs. This greater Work,, as he 
intimates at the Glofe of this Difcourfe, is to conlift of 
three Parts, the firfl of which contains the Definition 
of Cry dal, with the Synonyms given it by feveral 
Authors both ancient and modern, and an Account of 
its Properties, Figure, Pellucidity, fpecifick Gravity, and 
Bignefs ^ as alfo the Place of its Growth, chiefly in re- 
gard to Swijferland , the mod plentiful Country in 
Europe , as to this Sort of natural Productions • the 
Signs, whereby hidden Cry dal Mines may be difco- 
ver’d, and the Way of working them. In the fecond 
Part will be examined the Opinions of feveral Natural 
Hidorians, about the Origin of Crydal, and the Au- 
thor’s own edabli fil’d and prov’d. In the third Part will 
be fhewn the Ufes of Chryftal, both Physical and Me- 
chanical, and fome few Hints given, relatingto thejud 
Value the World has at all Times put upon this beauti- 
ful Production of Nature. 
2 
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