made in _Anatomy_: We should be reckoned unworthy the Advantages we enjoy, if we did not study to apply them to the Benefit of Mankind in general. The more inquisitive and learned Part of the World, are at this time very well assured that the Animal Body is an exquisitely framed Machine, and that it’s Composure is little else than a Compages of branching and winding Canals, which are kept to a moderate Degree of Extention, by Fluids of different Natures; and that the Motions of these were first determined by the divine Architect: Thus in a natural State, the whole _Fabrick_ is governed by certain Laws impressed on the Fluids; and we often find the unhappy Consequences of the Discomposure of a Part, to discover themselves first by an Interruption of the Motion of the animal Juices. Thus in a _Cancer_ of the Breast which proceeds from a Blow or Bruise (as upon strict Enquiry we have found they most commonly do) is it not probable that by such means a Confusion of the true Order of the little Glandulous Grains and their excretory Ducts may happen? and at the same time an extravasated _Lympha_ may lodge in such a spungy Texture, which in time becoming viscid, will coalesce with the Glandular Substance, and form a _Mass_ considerably compact? Now this being so, it is reasonable to believe that as the Lymphatic Juice continues its Motion till it arrives at the indurated Part, its Passage must be embarrassed there; upon which, it will soon be qualified for an Union with the remaining Part of the glandulous Substance of the Breast; and so the whole be perfectly changed from what it was before. This _Hypothesis_ is in a great Measure grounded on Experiments; for if we express a Juice from some of the _Cancerous Mass_, and hold some of it in a Spoon over a Fire, there immediately flys off a small Vapour, and the Remainder hardens not unlike the white of an Egg boiled; this shows it to have the Properties of the _Lympha_; for the Chymical _Analysis_ of that Liquor assures us it is a Composition of a great deal of fixt _Sulphur_, a little _Volatile_, some _Phlegm_, and much _Volatile Alkalie_; to which some add a little Earth: Now while the _Volatile Alkalie_ keeps the Sulphur dissolved, the _Lympha_ remains in a State of Fluidity; but when, by making the same Experiment, the _Volatile Alkalie_ is evaporated, the Remainder hardens, and forms a pretty compact, whitish Substance. From hence the judicious _SURGEON_ may easily deduce the Reason why these Sort of Tumours can never be brought to Suppuration. We shall not be so particular as to mention those _Cancers_ which proceed from internal Causes, nor several other things which relate to the former; for what we have here said, we look upon to be commonly the Method of the Formation of them; and as such, we did endeavour to calculate Remedies that should peculiarly operate on the _Mass_, so as to dis-unite the firm Cohæsion of its Parts, and dispose them