13. Ioan. Schwab, Dissertatio terrae in ordinem systematicum digestae, praemissa historia litteraria dissertation on earths arranged in systematic order, with a preface on literary history, Respondent Iac. Falk. Heidelberg. 1778. 8vo. pp. 21-34.
Contains, as a continuation of the previous work, lime and sand types.

14. Ioan. Schwab, Dissertatio terrae in ordinem systematicum digestae, praemissa historia litteraria dissertation on earths arranged in systematic order, with a preface on literary history, Respondent Wilh. Lud. Zollikoffer. Heidelberg. 1778. 8vo. 58 pages.
Contains, following a provided index of writings on earths from the current century, besides the two previously mentioned treatises (No. 12 and 13), also marl, selenite, talc, and mica-dust earths.

15. Torbern Bergmann, Dissertatio de terra silicea dissertation concerning siliceous earth (flint earth), Respondent Grönland. Uppsala. 1779. 4to.
Translated into German by Christ. Ehrenfried Weigel in: Ernst Gottfried Baldinger’s neuem Magazin für Aerzte new magazine for physicians III. p. 298 ff.

§. 2.

Section II,

on the use of earths *)

1. Pet. v. Mancoza, de terris variis earumque in medicina usu concerning various earths and their use in medicine. Lisbon. 1653.
2. Joan. Aug. Rivini, Dissertatio tentamina circa terras medicinales dissertation on experiments concerning medicinal earths, Respondent Miekisch. Leipzig. 1723. 4to. 3 1/2 sheets.
3. Johann Heinrich Pott’s chymische Untersuchungen, welche vornehmlich von der Lithogeognosie chemical investigations, which deal primarily with lithogeognosy

*) See also Mineralogy. Part II. §. 10. No. 1.