A greatly expanded version of Boerhaave's Methodus discendi medicinam (1726), resulting in a text perhaps triple or quadruple its original length.  While Boerhaave frequently cited classic authors in his lectures, Haller added extensive bibliographical lists to each chapter, with some entries annotated, resulting in a subject bibliography of useful works to the student, including many 16th century books. As knowledge did not necessarily progress very rapidly at the time, it is unclear whether Haller regarded works published even two centuries earlier as historical classics, or as still useful for their scientific information, or as both. Lindeboom, Bibliographia Boerhaaviana (1959) No. 98.