cavities of the joints, puts them from their seats, as it oft-times happens to the joint of the hip by Sciaticaes, and to the Vertebrae of the spine, by whose Luxation people become gibbous, or otherwise crooked. But external causes of Dislocations are falls from high, bruising and heavy blows, the Rack, Strappado, slipping in going, and all such like things, which may force the heads of the bones to fly out of their seats, or cavities, which also happens sometimes to Infants in their birth, when as they are too carelesly and violently drawn forth by the Midwife, so that ei∣ther their arms or legs are put out of joint. Hereditary causes are such as the Parents transfuse into their off-spring: hence it is, that crooked not necessarily, but oftentimes are generated by crooked, and lame by lame. The truth whereof is evident by daily experience: Besides also Hip∣pocrates himself avers, that infants in the very womb may have their Joints dislocated by a fall, blow, and compression, and by the too much humidity and looseness of the Joints: whence also we see many crook legg'd and footed from their nativity; so that none need marvel or make any doubt hereof. We have read it observed by Galen, In libro de Artic. that children may have im∣posthumes in their mothers wombs, which may cast forth quitture, the ulcers being opened of their own accord, and be cicatrized by the only benefit of nature. It also happens to many from their first conformation, that the cavities of their Joints are less deprest than they should be, and that their verges are more dilated than they ought to be; whereby it happens that the heads of the bones can the less enter into them. It falls out that othersome have the ligaments appoint∣ed by nature for fastning together the bones of the joint, whether inserted or placed about, so weak, that from their first original they are not of sufficient strength, or else abound with much phlegm, either bred together with them, or flowing from some other place; so that by their too much slipperiness they less faithfully contain the knittings or articulations of the bones. In all these, as the bones are easily dislocated, so they may presently be easily restored, without the assi∣stance of a Surgeon, as I have sometimes observed in some.