'---- Jackson, residing at ----, aged two years six months, who had been kept _at the breast twenty-two months_, was in a dying state when I was requested to see her. The pulse was preternaturally slow--great stupor--dilatation of the pupils, and diastasis of the bones of the head. In six hours from the time I first saw her she died, and the mother was desirous that the head should be examined, having lost a child previously, in what she considered a similar manner. On removing the scalp I found the cranium very much enlarged and altered in shape. Between the tunica arachnoides and pia mater, there was a quantity of water effused;--the sides and upper surface of the brain were exceedingly soft. In the lateral ventricles there were from six to eight ounces of water. In answer to a few questions I asked the mother, she stated that her former child was, during the _first ten months_ of its life, _a plump, healthy infant_,--_after that period he altered_,--the stomach, bowels, and _head became affected_, and, in the course of a few months, he manifested similar symptoms to those which proved fatal in the case of his sister. He was _suckled for twenty-one months_, and _died_ at the age of _twenty-seven months_. The mother of these children has one other child alive, and at my urgent request it was weaned at _nine months_,--it is now _seventeen months old, and in excellent health_.' CASE XVI. 'Mrs. A----, of ----, had a little boy who at _ten months old_ had nine teeth, which were cut with little or no difficulty:--_at this time he was in good health_,--_he was allowed the breast until nineteen months, and at the expiration of three months more, died of Hydrocephalus_.' CASE XVII. 'Mrs. T---- lost a child of Hydrocephalus, and has an infant _now at the breast seventeen months old_;--the little patient is frequently suffering from _cerebral disturbance_. I have repeatedly advised the mother to wean it--she objects, and gives the usual reason for allowing it to remain at the breast--viz., that she does it to _prevent becoming again enceinte_.' CASE XVIII. 'This day, (August 13, 1831,) a little child labouring under _cerebral disease_ was brought to me for advice, and he appeared certainly in a most pitiable state; he is _two years four months old_ and is _now at the breast_,--I do not think it possible for him to survive many days.' II. _Cases of Meningitis, arising at an after period, in consequence of protracted suckling._ CASE XIX. Francis Page, aged six years, admitted for _Meningitis_,--_suckled one year_. CASE XX. Henry Taylor, aged six years, admitted for _Meningitis_,--_suckled fourteen months_. CASE XXI. Julia Brown, aged three years, admitted for _Meningitis_,--_suckled thirteen months_. CASE XXII. James Neil, aged seven years six months, admitted for _Meningitis_,--_suckled fourteen months_. CASE XXIII. Eliza Park, aged six years, laboured under _Meningitis_,--_suckled fourteen months_. CASE XXIV.