Specimen academicum, de crystallorum generatione, quod consent. ampliss. Facult. Med. im Reg. Acad. Upsaliensi, sub præsidio ... Dn. Doct. Caroli Linnæi, ... publico examini modeste submittit Martinus Kähler, Stockholmiensis. In audit. Gust. Maj. d. XXII. Decemb. Anni MDCCXLVII. von Linné, Carl