The environment of the school creates a necessity for certain internal adaptative actions, and if this adaptative action can not take place the result will be an abnormal condition peculiar to the necessity for adaptation. The lack of adaptation may result in incoördinations of the respiratory tract; incoördinations of the eyes, involving not only the sight but the different tissues and secretions of the eyes; incoördinations involving the heart, throat and mouth and many conditions of eruptions of the skin. Especially do we find deformities and incoördinations of the spine and spinal column. In diagnostic terminology these conditions would be called bronchitis, bronchopneumonia, pleurisy, myopia, catarrhal conjunctivitis, trachoma, cardiac dis-eases, such as endocarditis, etc. The mouth, nose and throat dis-eases would be coryza, adenoid growths, enlarged tonsils, tonsilitis, nose bleed, etc. These conditions could all be prevented or corrected by adjusting the causative subluxations. Prophylaxis It is not necessary for us to go into an explanation of the spinal column and how subluxations are produced. It is sufficient at this time to call the student’s attention to the fact that subluxations are often produced, and especially is this true during childhood. The children are subject to falls during their play at school and they are most likely to produce subluxations. This being true, the children should be analyzed periodically to determine the subluxations and then they should be adjusted. When parents realize the good that is to come from such procedure they will take their children to the chiropractor and have their spine palpated and the subluxations adjusted. When this becomes a universal practice there will be a marked decrease in the so-called school dis-eases or children’s dis-eases. CHAPTER IX INDUSTRIAL HYGIENE INDUSTRIAL HYGIENE GENERAL CONSIDERATIONS DEFINITIONS NECESSITY FOR INDUSTRIAL HYGIENE PROPER ENVIRONMENT EFFECT OF OCCUPATION UPON HEALTH PERSONAL FACTORS CHOICE OF OCCUPATION IDIOSYNCRASIES CONSIDERED SEX REGARDED EFFECT OF LABOR UPON CHILDREN MAY CAUSE CURVATURES CHILD LABOR PROHIBITED PLACE OF WORK EFFECT OF POSTURE SEDENTARY OCCUPATIONS ACTIVE OCCUPATIONS FATIGUE HOW PRODUCED RESULT HYGIENE AND SANITATION OF INDUSTRIAL ESTABLISHMENTS SPACE PER INDIVIDUAL CHARACTER OF BUILDING LIGHTING, HEATING AND VENTILATING WORK PLACES LIGHTING TEMPERATURE HUMIDITY AIR PRESSURE LOCATION OF WORK INDUSTRIAL DUSTS MECHANICAL VENTILATION CLASSIFICATION OF DUSTY TRADES INDUSTRIAL POISONS LEAD POISONING SYMPTOMS PREVENTIVE METHODS ARSENIC POISONING SYMPTOMS WHERE USED MERCURIAL POISONING SYMPTOMS HOW CONTRACTED PREVENTIVE METHODS PHOSPHORUS POISONING TWO VARIETIES SYMPTOMS WORKERS AFFECTED CHROMIUM POISONING HOW CONTRACTED PARTS AFFECTED CHAPTER IX