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FARMER X'S HOUSEHOLD
                     
Case No.
Description Age (yr.)
Occupation Length of residence at farm (yr.)
Previous residence
Degree of dental fluorosis Symptoms
Urine analysis*
(Dr. H. H. Green), fluorine p.p.m. corrected to sp. gr. 1.015
Remarks Radiological examination
                     
1. Farmer X 38 Farmer 14 Leics Moderate Frequent cough, pain in right shoulder, blurred vision unrelieved by glasses, pain over head 2.9 Youngest child of cases 1 and 2 died at 2 months of bronchitis in April, 1941 Slight arthritis of right acromioclavicular joint; no lesion seen in chest
2. Wife of X 41 Housewife
14 Leics, born Notts (Edentuous) Loss of appetite and of weight; recent pneumonia; stiffness of left elbow 2.3 " " Old calcified tuberculous lesion in right upper lung; no lesion seen in left elbow
3. Daughter of cases 1 and 2
15 Housework 14 Leics Moderate Stiffness in both knees and calves, worse in winter 1.6 Has winged scapulae and a "Rossetti" neck No lesions seen in chest or knees
4. Son of cases 1 and 2 13 At school, farmwork in holidays 13 "" Moderate Left leg aches when he runs 4.2 Sleeps facing fumes; window glass etched No lesions seen in chest or left leg
5. Son of cases 1 and 2 9 Schoolboy 9 "" Mild Frequent catarrh and cough Not examined Sleeps with case 4 Slightly increased markings in chest
6. Son of cases 1 and 2 3 At home 3 "" Moderate in milk-teeth Pain in knees, legs, and ankles; two attacks pneumonia; continuous bronchial catarrh 2.0 " " No lesions seen in knees, ankles, or chest
7. Father of case 1 78 Shepherd 14 Leics (Edentulous) Bronchial catarrh; pain in stomach Not examined Sleeps with case 8 No definite lesions seen in chest
8. Mother of case 1 80 Housewife 14 Leics, born Rutland (Edentulous) Pain in back and right knee
4.1 Sleeps in room facing fumes; window glass etched No change in bones of thoracic cage; bones show some increased markings, particularly basal, compatible with congestive change
9. Directed "worker" 18 Agricultural labourer 1 London S.E. ** Moderate Gastric upsets " " " " No lesion seen in chest

* The "corrected values" here take an average normal sp. gr. as 1.015 for the human subject and facilitate comparison of individuals irrespective of water output. An average fluorine figure for human urine on city dietaries may be taken as anything up to 0.5 ppm., so long as the water-supply does not itself exceed this figure. When it does, the urine figures tend to approximate to the higher water-values (McClure and Kinser 1944). The domestic water used by this household contained 0.6 PPM
** For fluorine figures in various sources of London's water-supply, see Metropolitan Water Board (1936); Murray and Wilson (1945).