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titutifit �tutritau. In order to verify this, a tear was half inclosed in plaster, The properties hitherto noted in Batavian tears, may be as in Fig. 2 . The tail was attacked with'hydrofl uoric acid, and found in tempered glass, and they are present in degree pro. the large end was cut with a saw. After rupture, the fragportionsl to the temper. If, however, the glass is but par ments were held in place by the plaster, and their position tially tempered, it is no longer possible to determinedoi:10.1038/scientificamerican01131877-19 fatcat:rmmvxd3kpnhg3l6ifmbfekhvn4