It is also no less generally known that food of a bad quality or improper description will produce derangements in the digestive organs. Now, having already shewn that the milk when lactation is protracted becomes deteriorated, it plainly appears that such milk is capable of occasioning derangement of the chylopoietic viscera; and it being allowed that derangement of these viscera, from any source, may give rise to inflammation of the brain, I conceive it follows that protracted lactation must be admitted as one cause of such effect. This train of reasoning, therefore, from generally admitted data, seems to _prove that Meningitis_, or inflammation of the brain, _in children can be produced by their being suckled for too long a period_, and _that it is so produced I assert from repeated experience_. An accidental perusal of Mr. Dendy's able work on the cutaneous diseases of children, published shortly after the appearance of my paper before referred to in the Medical and Physical Journal, has recently afforded me the pleasure of finding that the author had been led to entertain similar general views on the subject under discussion with myself; I have, therefore, taken the opportunity of adding that gentleman's testimony to my own, by quoting the following passage from his work above mentioned. 'It may be truly said, that _the infantine disease excited by milk of a deleterious, or simply impoverished quality, "grows by what it feeds on;"_ and we shall witness the internal debility and the infantine disorder running their course together. Tabes is the natural consequence of this error; but its effect is evinced by the occurrence of other disorders. A defective degree of nutrition, as I have elsewhere stated, predisposes the system to become influenced by comparatively slight excitement; and thus, in addition to the direct excitement of disease, it becomes indirectly its predisposing cause. _Under its influence the serous_[L] and mucous _membranes become readily the seat of inflammatory action_.'