The biochemical and microbiological properties of bottom muds in a bay or an inland sea may vary owing to the slight differences in layers of muds. In sampling, therefore, it must be given attention to that the layer of muds might be not disturbed, and it should be taken as it is. Using the ordinary sampling-apparatus, the layer of muds is disturbed and it can be hardly taken as it is. Although there is the core-sampler of the apparatus being employed at present, it can be scarcely used, because it is on a very large scale. In this paper, the simple core-sampler fitted for the purpose is designed, and an example of analytical data of the bottom muds taken from Maizuru bay with this apparatus is shown in the Table 1.
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KIMATA et al. (1960) studied this question.