二氧化碳保鲜肉和鱼.pdf

140 INDUSTRIAL AND ENGINEERING CHEMISTRY Vol. 22, KO.2 The heating chamber of this apparatus was essentially the with a cathetometer. Plasticity in the briquet wsindicated same as that in Figure 1 4 .e., a vertical inner tube to receive by a slow settling of the vertical rod and the briquet was the sample, this tube immersed in a lead bath, and the bath examined for deformation at the end of the run. The results heated in an electric furnace. As in determining the softening obtained with this apparatus are summarized in Table 111. point, nitrogen was passed down through the steel coil and up It will be noted that both these coals exhibited plasticity at through the inner tube containing the coal sample. At the temperatures as much as 35 degrees below their softening bottom of the inner tube was placed a short solid cylinder of points as determined by the gas-flow method, and that steel, somewhat smaller in diameter than the inner tube, with S o . 2 coal is more plastic near its softening point than is No. a flat-bottom well at its upper end. The coal to be tested 10coal. was made into a briquet and placed in the well. On the There is probably a relationship between the degree of briquet rested a steel rod which passed up through guides and plasticity exhibited below the softening point and the degree carried a platform for weights at its upper end. I n order not of fluidity reached after the coal passes the softening point; to place too much weight on the electric furnace, the inner and the differen