"De Baetyliis" by Franz Ludwig Bösigk (1854).
archive.org/details/boesigk-de…
De Baetyliis : Franz Ludwig Bösigk : Free Download, Borrow, and Streaming : Internet Archive
De Baetyliis.Dissertatio InauguralisQuam Consensu et AuctoritateAmplissimi Philosophorum OrdinisIn Alma Litterarum UniversitateFriderica GuilelmaAd Summos in...Internet Archive