2. On the lower part of the thumb for bone "Seven." Repeat from the beginning, until the children can touch and count each bone properly. III. 1. Keep the thumb erect; raise the first finger of the left hand. 2. Place the index finger on the bone between the tip and the first joint of the first finger for bone "Eight." 3. Between the first and middle joint for bone "Nine." 4. Between the middle and third joint for bone "Ten." Review, from the beginning, until the class can touch and count every bone as directed. IV. 1. Keep the thumb and forefinger erect; raise the second finger and touch, as in the lesson on the first finger bones, "Eleven," "Twelve," and "Thirteen." Review. 2. Proceed in the same manner for the third and fourth fingers, always beginning with the bone nearest the tip of the finger, and touching that at the lowest part last. If the exercise has been properly performed, every child will say "Nineteen" as its index finger touches the lowest bone of the little finger, and all the fingers of every left hand will be outspread. * * * * * THE BONES OF THE HEAD: Skull 8 Face, including the lower jaw 14 Tongue 1 Ears 8 ---- 31 OF THE TRUNK: Spine 24 Ribs 24 Breastbone 8 Shoulder blades 2 Collar bones 2 ---- 60 OF THE UPPER LIMBS: Upper arms 1 x 2 = 2 Fore-arms 2 x 2 = 4 Wrists 8 x 2 = 16 Hands 19 x 2 = 38 ---- 60 OF THE LOWER LIMBS: Thighs 1 x 2 = 2 Knee-pans 1 x 2 = 2 Lower legs 2 x 2 = 4 Feet 26 x 2 = 52 ---- 60 Total, 211, not including the teeth.[1] We teach the children to say "about two hundred," because there is not always the same number of bones in the body. In some parts two or three bones unite and form one bone. For example: the breastbone of a child is made up of eight pieces; some of these unite as it becomes older, so that when fully grown it has but three pieces in this bone. [1] The teeth are not bone, but a kind of soft, bone-like substance, called _dentine_. Common ivory is dentine. * * * * * PART IV. FORMULAS FOR THE LESSONS ON THE ORGANS OF SENSE. 1. _The Eyes._--My eyes are to see with.