It remains now to examine, of what kind of Particles chiefly Milk is composed; which appear to be these three: The first is a fat, butyraceous, oily, and sulphureous Substance. The second is cheesy, earthy, chalky, and saline. The third is the Vehicle of these, _viz._ serous, which is watry, with a Mixture of nitrous Salts. But these Parts don’t hold the same Proportion in the Milk of all Animals; Cows Milk is most used in Food, it is thick and fat, and contains more Butter than the Milk of other Animals; upon which account it nourishes more, and is more agreeable to the human Body. Ews Milk hath more earthy and cheesy Particles; Goats Milk is in a Mean between these two, only that its _Serum_ contains more of a nitrous Salt; whence _Etmuller_ conjectures, that it hath all the Virtues of Whey made from Cows Milk, especially in Heats and scorbutick Cases. Asses Milk is of all the thinnest, next to human; the Milk of other Animals, as not so usually brought into Food, I forbear to describe. SECT. 6. It is manifest, that every Part of the Milk exerts an Effect proper to it self; the fat Part, from which the Butter is formed, preserves from the Stone, which affords an evident Reason why Stones taken from the human Body, upon Distillation, afford so small a Portion of Oyl; whence I am of Opinion, that the Stone is most commonly generated in the Kidneys and Bladder, when the Blood is not sufficiently stocked with oily Particles. Upon this Principle it is easy to see why all oily Substances, as Oyl of Sweet Almonds, taken plentifully, is a Remedy in the Stone; for the oily Particles (as _Hoffman_ observes in his Notes upon _Poterius_) by their Hooks hinder the Saline _Spicula_ from uniting so as to form an hard Substance. It is known in the Chymistry, that Oyl resists Crystallization; and many Artists that are minded to have beautiful Crystals, add rectified Spirit of Wine to their Lye, in order to absorb the Oyl. Upon the same Principles, the Precipitation of the earthy Particles, and the lodging thereof in the Membranes of the Joints, so as to form chalky Knots, are prevented. _Poterius_ tells us of a Woman of Sixty, who was so reduced in her Flesh and Strength, that she was scarce sensible of Pain, who by the Help of Goat’s Milk, was in three Months Time restored to a State of perfect Health, notwithstanding a great Decay of Strength and Flesh, an Hectick Fever, and a Stone; she took at first but four Ounces of the Milk, which was at length increased to eight; at the End of fifteen Days she voided some oblong and Very hard Stones, upon which she began to recover. She continued the Use of the Milk for a Month, at which Time the Fever left her, her Appetite returned, and she began to gather Flesh. She was alive and hearty in the Sixty Eighth Year of her Age, when _Poterius_ gave his Account. Although in this Case the oily Particles of the Blood might contribute much to lubricate the Passages, yet