On expectorated matter

Dr. Pearson’s inquiry comprehends several varieties of expectorated matter, which he arranges under the following heads: 1. That which is semi-transparent blueish, and of the consistence, of jelly. 2. What is transparent and fluid, as mucilage. The 3rd is thick, opake, and straw-coloured, or white, and very tenacious. 4. Puriform matter secreted without breach of surface. 5. Matter consisting of the mixture of the 2nd and 3rd, or 2nd and 4th varieties. 6. Pus from vomicæ, arising from tubercles. 7. Pus from vomicæ, consequent on simple inflammation. The author next treats more at large of the sensible or obvious properties, including smell, taste, weight relative to water, and appearance under the microscope.