A natural, commercial and medicinal treatise on tea [electronic resource] : With a concise account of the East India Company-Thoughts on its government, &c. Also, an advice as to the use and abuse of Tea, the qualities of waters, and vessels, employed in its infusion, with other miscellaneous observations. To which is added an appendix, recommending the distillation of fresh from salt water, on board merchant ships, by a new process. Multum in parvo. By Godfrey Mccalman, Surgeon in Greenoch.