The attacks are not periodic, but nearly always depend on some chance dietary indiscretion, or other imprudence, which has visibly aggravated the stomach irritation. And, when the pain does come on, it has no uniform tendency to go on intensifying for some hours and culminate in vomiting, followed by sleep, after which the patient is free. On the contrary, the digestive disturbance is the provocation, and the pain itself is of a heavy character, with a sense of tension or fulness, and it does not go on intensifying in a regular manner, up to a climax, but hangs about in a dull, tormenting way, and frequently is just as bad after sleep as it was before. The diagnosis of these headaches from neuralgic headache is not really difficult; it only requires the use of a fair amount of caution in observation. It would, however, be exceedingly advantageous that the word "sick-headache" should be dropped altogether, and that migraine should always be called by that name (or "megrim," if you will), and that headaches really proceeding from chronic catarrhal disease of the stomach should be called "dyspeptic" headaches. The present state of nomenclature does much to perpetuate a confusion of ideas which ought not to exist any longer, and which leads to much practical mischief. * * * * * Transcriber's Notes: Punctuation and spelling errors fixed. Variant spellings and hyphenations changed when there is a clear majority. Other unusual spellings retained. Discrepancies in headings and outline labels repaired. In some cases, this required adding headings implied but not present in the original, to agree with headings that were present. Table of Contents, Part 1, Chapter IV: original reads "DIAGNOSIS AND PROGRESS OF NEURALGIA." "PROGRESS" has been corrected to "PROGNOSIS" as shown in the Chapter heading. P. 51, "but her mensural troubles" changed to "but her menstrual troubles". P. 67, footnote #14. Original reads "Journ. de Med. et Chim. Prat." "Chim." is typo for "Chir." as in footnote just above. P. 96, "investigation of neralgi" changed to "investigation of neuralgia". P. 105, "genealogical connection between migraine and epilepsy": in all reviewed copies of this 1882 edition, original shows "aological" with 4 or 5 spaces in front of it, an apparent printer error. However, in the 1872 edition, the entire sentence reads as presented here. P. 206, "I have already causually" changed to "I have already causally".