In this paper the results of the test of mental fitness for the action requiring quickness carried out on 12 children (9-12 years) of the special class for the education of the handicapped in an elementary school were reported. The test method was the same in the preceeding paper. The test was performed on the children without any difficulties in spite of that the subjects were small and less intelligent than the average. The score of the test of each subject was observed in relation to the character, behavior, the evaluation in physical education and intelligence quotient of th subiect. The following were the results.
1) The curves showing learning effect of the subjects were quite different from that of the children in the normal class in an elementary school.
2) From the score of the tests, it was not shown any essentials for the children of this class except that the score were clearly less excellent than that of the children of the normal class, and that the score had more close relation to the character, and the behavior of the subject than that of the children of the normal class.

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1. Study was performed by silver impregnation method on nerve fibres and motor end plates in muscular tissue from autopsy 4 cases with neurogenic amyotrophy (3 cases of amyotrophic lateral sclerosis and 1 case of neuromyelitis optica) and 5 cases with myogenic amyotrophy (2 cases of progressive muscular dystrophy, 2 cases of myotonic dystrophy and 1 case myasthenia gravis). Control study was similarly made on skeletal muscular tissue from 1 biopsy and 4 autpsy cases.
2. The control muscular tissue was rich in nerve fibre bundles, which longitudinally ran through muscular fibre bundles, branching and forming an end plate for each of the latter. The end plate consisted of the terminal arborization of subterminal axon, sole plate and end plate nuclei, with a caliber of 19.5μat minium, 52.7μat maxium and 32.1μon average. ATIR, i. e. ratio of the number of end plates to that subterminal axon was approximately 1. There was no finding of multiple innervation in the control cases.
3. In muscular tissue involved in neurogenic amyotrophy, the common findings were decrease in nerve fibres among muscular fibres and diminution of end plates.
And some of the observed terminal arborizations of the end plate were reduced in stainability. A case of amyotrophic lateral sclerosis of 10 year duration showed rich nerve fibre bundles in severely atrophied muscular tissue and collateral sprouting. Also end plates were observed in a large number, but their calibers were reduced.
4. In 2 cases of progressive muscular dystrophy, nerve fibres were amply observed, but end plates were reduced in caliber, and simplified in structure. Also collateral sproutings and free endings were visible. These alterrations are considered to be secondary lesions, accompanying the degenerative atrophy of the muscle.
5. Alterrations seen in myotonic dystrophy were nearly the same with those in progressive muscular dystrophy.
6. In muscular tissue involved in myasthenia gravis, there were collateral sproutings from the subterminal axon and also multiple innervation. Many end plates showed complicatedly brahched structure, and slight elongation and segmentation were observed, though in a small number.
7. Muscle spindles in muscular tissue were also examined. They showed no alterrations except in a case of myotonic dystrophy, in whom thickning of the capsule, edema in subcapsular space, reduction of intrafusal fibres in diameter and their increase in number were observed in some of the examined spindles. Thus the degenerative atrophy in this disease was sometimes accompanied by lesion in the muscle spindle.

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Group-active glycoprotein from individual saliva was partially purified with ethanol and assayed on its serological activities and constituents to elucidate characteristics of Lewis (a-b-) type. H, A, and B activities of secretor·Le (a-b-) is higher than those of secretor·Le (a±b+) type.
Gas chromatographic determination showed that all the purified glycoproteins contain mannose besides fucose, galactose, N-acetylglucosamine, N-acetylgalactosamine, and sialic acid, irrespective of blood group specificities. The mannose has not been ever confirmed present in human salivary blood group substances, but glucose is absent in all preparations tested.
Secretor·Le (a-b-) type was divided into two groups; one's fucose content is very rich and other's very poor, in a ratio of five to one. Accordingly, there exists an relationship between blood group specificity and fucose content as described below ; the greater part of secretor·Le (a-b-) >secretor·Le (a±b+) >non-secretor·Le (a+b-) > non-secretor·Le (a-b-) and the smaller part of secretor·Le (a-b-). In addition, Le (a-b-) type has characteristics distinct from Le (a±b+) or Le (a+b-) on molar ratios of galactose/fucose, galactose/N-acetylhexosamines and N-acetylhexosamines/fucose.

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In order to estimate human damages produced by air pollution it is necessary to make repeated screenings and flow-up studies. As for the examinees, adults are difficult to collect in such a large number that we can obtain a respondent rate high enough to estimate the regional level of health. With school children, however, we have no difficulty not only in obtaining a sufficiently high respondent rate but also in finding controls
In Gunma Prefecture, where the deterioration of the living milieu has rised the question of air polltion, but where detailed data on the chemical determination of confaminants are not available, we performed mass examination of pulmonary function with school children in two areas - neighboring a group of chemical factories and a refinery, respectively - in order to estimate the incipient damage to the human body. The used instruments were a Vitalor-type EV meter and Wright's peak flow meter. The examinees, aged 612 years, numbeered 2, 795.
1) In School children living near a group of chemical factories, the means of forced vital capacity (VC) was significantly lower than in controls (P<0.05P<0.01), in both sexes and in all age groups excepting those aged 12.
2) It was the same with the timed vital capacity (FEV_1.0), the level of significance being P<0.01 in all the cases.
3) With regard to P. F. R., significant difference (P<0.05P<0.01) was observed only in lower class children aged 67.
4) In school childred near a refinery, each obserbed value was generally lower than in controls. But it was only VC and FEV_1.0 in the age of 11 years that showed signiricant difference (P<0.01).
5) Prevalences of the restrictive and the obstructive impairment and of the combination of them, as indicated by %VC and %4FEV_1.0, were significantly higher (P<0.01) in school children near a group of chemical factories.

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