Sentence:  She had paſſed through the milder Remedies frequently without ſucceſs: upon which account I deſigned <WSD>Mercurialls</WSD>; and beginning with Venæſection, afterwards purged her with "decoct. epithymi", as it is preſcribed in the method of Cure. [...] After I had thus evacuated the "Plethora", and diſpoſed her body for <WSD>Mercurialls</WSD> more operative, I gave her each morning and evening a few grains of "Mercur. diaphoret." in a "bolus" with "conſ. lujule" and Mithridate, [...] 
Meaning of the word marked with <WSD> tags:  A preparation of mercury, especially as a treatment for syphilis. (from 17th c.)