Observations on the Distinguishing Symptoms of Three Different Species of Pulmonary Consumption, the Catarrhal, the Apostematous, and the Tuberculous ... To Which is Added, an Appendix, on the Preparation and Use of Lactucarium, or Lettuce-opium

Originally published in the late 18th century, this book is a seminal work on pulmonary consumption. Duncan describes three separate species of the disease and offers detailed descriptions of their symptoms and progression. The appendix on lactucarium provides a glimpse into early medicinal practices and the use of opioids in treating disease.

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