Details of the Day's Work.--If patients are to be benefited through mental influence it is extremely important that details as to occupation be completely secured. This must include, especially in cases where there are objective but obscure symptoms, minute information that may seem trivial, and yet which often proves to be of great importance. In recent years there has been profound study of the dangers of trades and occupations. Anyone who wants to treat nervous patients, must know much about these occupations, for otherwise symptoms may be ascribed to old infections, to obscure rheumatic conditions, to intestinal auto-intoxication, or to nervous weakness or exhaustion, when they are really the result of occupation-conditions. The various poisons must be carefully looked for, or affections will be wrongly treated. I have had a series of cases of lead poisoning [Footnote 22] under most unexpected conditions which have taught me much as to the possibilities of obscure plumbism. Lead poisoning from new lead pipes--with no one else in the household suffering from it, lead poisoning from frequent drinking of carbonated waters, the bottles of which had the old-fashioned lead stoppers, lead poisoning from the painting of a flat by a settlement worker who could not get a painter to do it, show how carefully such things must be looked for. [Footnote 22: "Curiosities of Lead Poisoning," _International Clinics_, Eighth Series, Vol. II.] _Dust and Respiratory Affections_.--Mechanical conditions connected with trades are especially important. Workers in dusty trades are almost sure to suffer severely from bronchitis at times, and to have the affection oftener than others, to have it "hang on longer," as they say, and eventually to have tuberculosis develop. There are some of the polishing trades in the metal industries in which it is impossible to maintain the ordinary death benefit fund that workmen have in other trades, because the men die so frequently and at such an early age from consumption that the drain on the treasury makes it impossible to maintain the fund. Practically all of the dusty occupations have this same tendency. This is true often in occupations where dust is sometimes not supposed to be much of a factor. Railroad trainmen suffer more frequently from colds than do those in other trades because of the dust to which they are exposed, and a trainman with incipient consumption will be greatly benefited by getting out of the dust during the summer months. Sweepers in large buildings, janitors and janitresses have colds that are often untractable because of the dust in their occupations. It is to be hoped that {173} the new vacuum cleaning system now becoming so popular will obviate these dangers, though like all improvements, it will probably bring its own dangers with it.