BUT however the TEETH most commonly break out about the _Seventh Month_, and first those call’d _Dentes Incisores_, or the _four_ fore-TEETH; which after a short _Interval_, are followed by the _two_ _Dog-Teeth_, commonly call’d the EYE-TEETH; and at last succeeded by the eight _Cheek-Teeth_ or GRINDERS, in each Jaw; the two last of the _Molares_, properly called _Dentes Sapientiæ_, springing only out about, or after the one and twentieth Year. Now as this _Eruption_, particularly _that_ of the DOG-TEETH, because of their very deep _Root_ and small _Nerve_, cannot happen without an _exquisite Sense_, and _intense Pain_ to the INFANT; so, from the continual _Solution_ of the GUMS, many præternatural _Affections_ seize the CHILD, according to _Hippocrates’s_ Catalogue[191]; to which, in short, I must only refer: Because if I was to enter upon the particular _Detail_ of all _These_, I should extend the _Limits_ of this WORK beyond all measure; wherefore I shall endeavour to comprehend them all under the _one following general Head_; viz.—— [Illustration] CHAP. XII. _Of the Acute Diseases of_ INFANTS. THE very tender _Nature_ and infirm _Constitution_ of CHILDREN, subject them to many various and grievous _Symptoms_, besides those to which they are expos’d by a vast variety of _Procatarctick Causes_. But as I am not in this place to enter upon the _Detail_ of these particular _Symptoms_, neither shall I enumerate their respective _Causes_: Which however is the less requisite, considering the _Regimen_ and _Nursement_ of the CHILD already prescribed in the foregoing _Chapters_; since the _least step_, degenerating from what is there inculcated, may prove an effectual _mediate Cause_; for all that indeed, according to the most Learned and Excellent Dr. _Harris_, the only _immediate Cause_ of all CHILDREN’S _Diseases_ is, an _Active_ and _prevailing_ ACID[192].