“AND FAMILY DISPENSATORY, | 65 
will come .oat-at the other. It is movable, and contains fockets'for the teeth; “and 
in old age, when the teeth fall-out,’ the foekets draw together, and become fharp. 
The teeth are‘bones properly fo called, white, fmooth, hard, and ‘folid, being 
indeed hardér than othérbones, that they might bite and chew hard things, ‘noc 
much inferior in hardnefs to ftones. They are naked, ‘without any ‘peridftion}’ yet 
endowed with a Kind of fenfe, as may be perceived by cold drink, or when fet on 
edge; which enfe is lodged in the inner, fofter and’ iore’ Hervous, part. They’ 
receive into their cavities nerves, which other bontsido ‘hot, atid by which they are 
tied:to the mandible with a finneurofis. The teech ebaridldalty grow, all a man’s 
life, becaufe they are daily worn by biting and grinding.’ ‘The tavities of the teeth 
are clothed with a little membrane of exquifite fenfe, whence ir is thar pains of the’ 
teeth are fo exceeding vehement: they have five litrle nerves ftom our firlt pair, 
which are fpread abroad within, and by fmall twigs mixed with’ the mutilaginous 
fubftance in the middle of the teeth; as alfo little arteries to give axe heat ree 
nourifhment, and little veins to carry back the blood after nutrition. 
‘The tongue-bones are feated under, the lower jaw, and in aDiipidnsols olleuet | 
the larynx. ‘They are commonly acbotiieed but one bone, though made up of three, 
The ufe of thefe bones is to keep the throat open, both for the ares of ee 
and for'receiving in of air in fpeaking or breathing. - 
The bones of the ears are the lea{t of all, being the bones fabfervient daitedrigs 
and are four om each fide. “ They are all placed in the firft cavity; their fubttance 
is hard and denfe,: but hollow within, that they might be lighter, and contain mars 
row'for their nourifhment ; they are as big in new-born babes as in men, but not fo 
hard. © -The:printipal of thefe bones are called malleus, the hammer ;) incus, the anvil ; 
fiapes, the ftirtup and'cs orbiculare, which is found and fivall, ‘joined by a fmall li- 
gament to the ftirrup fide, ‘where it is joined to the anvil. The ufes of thefe bones — 
are to ferve the fenfe of hearing, and to make'a paflage for the excrements’ of the 
ears: for the ftirrup, fhutting the oval, is moved by the anvil, and the anvil being 
{mitten by the hammer, and the hammer by the membrane “of the drum, through 
the impulfe of the external air, the membrane of the drum sti the mean while driven 
‘inwards, whereby the inbred air is affected, which, -paffing through the cochlea, 
caufes the branches of the auditory: nerve ¢ to Angnche — of ee and to 
Ceirintiniceee, the fame tothe brain. © LW O55 
"The bones of the neck, and lish rags vik; Siomitie cranium Ne 
or fkull to the ‘0s Coccygis or crapper-bone, are terme: Spina, the thorns beca the yd 
ind: ‘part of it eenglis cesar ‘ at seas ‘The seis: the dp po 
