Of the Forty six of the Face, Twenty seven are counted in the Upper-Jaw, _viz._ the two _Zygomatick_, or the two Bones of the Cheek-Knots; the two _Lachrymal_ in the great Corners of the Eyes toward the Nose; the two _Maxillar_, that receive the Upper-Teeth, and which form part of the Palate of the Mouth, and the Orbits of the Eyes; the two Bones of the Nose; the two Palate-Bones which are at its end, and behind the Nostrils; the last being single is the _Vomer_, which makes the Division of the lower part of the Nostrils; and there are generally Sixteen Upper-Teeth. The Lower-Jaw contains Nineteen Bones, _viz._ sixteen Teeth; two Bones that receive them; and the _Os Hyoides_, which is single, and fix'd at the Root of the Tongue. {18} _How are the Teeth usually divided with respect to their Qualities?_ Into _Incisive_ or Cutters, _Canine_ or Dog-Teeth, and _Molar_ or Grinders: There are eight Incisive, and four Canine, which have only one single Root; as also twenty Molar, every one whereof hath one, two, or three Roots. _Can you recite the Number of the Bones of the Trunk or Chest?_ There are generally thirty and three in the _Spine_ or Chine-Bone of the Back, _viz._ seven _Vertebra's_ in the Neck, twelve in the Back, five in the Legs, five, six, and sometimes seven in the _Os Sacrum_, three or four in the _Coccyx_, and two Cartilages at its end. There are twenty nine in the Breast, _viz._ twenty four Ribs, two Clavicles or Channel-Bones and commonly three Bones in the _Sternum_. The Hip-Bones are likewise divided into three, _viz._ _Ilion_, _Ischion_ and _Os Pubis_. _Do you know the Number of the Bones of the Arms?_ There are thirty and one Bones in each Arm, that is to say, the _Omoplata_ or Shoulder-Blade; the _Humerus_ or Shoulder-Bone; the two Bones of the Elbow call'd _Ulna_, and _Radius_; eight little Bones in the _Carpus_ or Wrist; five in the _Metacarpium_ or Back of the Hand; and fourteen in the Fingers, three to every one except the Thumb, which hath only two. _Can you give us a List of the Bones of the Leg in their Order?_ There are thirty Bones in each Leg, _viz._ the _Femur_ or great Thigh-Bone, the Knee-Pan or {19} Whirl-Bone on the top of the Knee; the _Tibia_, _greater Focile_, or Shin-Bone; and the _Perone_ or _Fibula_, or _lesser Focile_, which are the two associated Bones of the Leg; seven little Bones in the _Tarsus_; five in the _Metatarsus_; and fourteen in the Toes; that is to say, three to every one, except the great Toe, which hath only two. Thus the Number of Bones of the Humane _Skeleton_ amounts to two hundred and Fifty, without reckoning the _Sesamoides_, the Indentings of the Skull, and some others which are not always to be found. * * * * * CHAP. VI. _Of Myology, or the Anatomy of the Muscles of a Humane Body._ _What is a Muscle?_