The Lymphaticks, are numberless Vessels, which pass through spungy Glands. These fine Tubes have a vast number of Valves, which prevent the Lymph, (or Liquor) which runs through them from going _a contrary_ Direction from that intended for it. These fine Vessels are dispersed over every Part of our Bodies. The Point of a needle could not be applied to a Spot, under the Skin, where the Mouth of a lymphatic Vessel did not open to imbibe whatever is put in contact with it. These minute Branches run into other Branches, so form larger Vessels, till at last they all unite in a general Reservoir, where the Lymph which they contained, mixes with the Chyle, (the fine Part of our Food, which is fit to be converted into Blood) conducted there by the Lacteals, (the Lacteals resemble the Lymphaticks—they open into the Stomach, and Bowels—they imbibe nothing but from _our Food_) the Chyle, and Lymph, thus mix’d, run up within the trunk of a large Vessel called the thoracic Duct, on the inside of the back Bone, which is incessantly emptying it’s Liquor into a Vein under the left Collar Bone, where it mixes with the Blood, is immediately convey’d into the vena Cava, which conducts it, with the returning Blood from the rest of the Body, (Lungs excepted) into the right Auricle of the Heart—it thence is drove by the contraction of the Auricle, into the right Ventricle of the Heart—by it’s contraction, into the Pulmonary Artery—from thence through the whole Lungs, where the Blood receives a Change from being impregnated with something received from the Air every Inspiration. The Blood thus changed, is collected from the Lungs into the Pulmonary Veins, and conducted into the left Auricle of the Heart; which drives it into the left Ventricle; which forces it into a great Artery, the Aorta—which rushes it over every other Part of the Body. The lymphatic Vessels prevent our Blood depending _solely_ on our Food for supply, and by means of them we can subsist some time merely on the Produce of our own Bodies. All these lymphatic Vessels are closely accompanied by Arteries—whose Pulsations assist the motion of the Lymph to it’s Reservoir:⸺Consequently the quicker and stronger they beat, the faster the Lymph is hurried into the Blood. Hence the Reason why Fevers occasion so speedy a wasting of the Flesh—hence Hectics bring on Consumptions—hence People in Fevers can subsist long with little Food,—The lymphaticks then supplying the Blood too abundantly from our own Juices. The Author of Nature has ordered an extraordinary Quantity of Blood to be prepared for the Child’s Food. Arteries run into the Glands of the Breasts, and in passing through them, the Blood, by a most wonderful Change, is converted into Milk!⸺by a Change, which nothing but Custom prevents our viewing as a Miracle!