Maxwell's theory of a heterogeneous dielectric 2. Houllevigue's theory of frictional resistance a. Dielectric without absorption b. Dielectric with absorption 3 Pellat's theory 4. Modified Pellat theory of von Schweidler a. Method of calculating the constants b. Calculated results c. Discussion of observations in the light of this theory 5. Hopkinson's theory of elastic after effect III . Summary and conclusion Grmer] Measuremeuts on Paper Condensers 497 33 and 100 cycles per second, was made on 12 different condensers, and at temperatures ranging from 10t o 35in steps of 5. This work was extended to other frequencies in July, 1907, the same condensers, together with one added to the previous list, being measured at 100, 300, 600, and 900 to 1000 cycles, the measure- ments at 100 cycles having been repeated to connect with the previous work. Owing to lack of time, only three temperatures, 15, 25, and 35could be included in the last set. The work was interrupted at this point by the absence of the author from the Bureau, and following his return, other more pressing work has intervened to prevent the completion of the original plan. It has seemed, therefore, best to present without further delay, the re- sults of the work already completed, together with such points of theoretical interest as have presented themselves in the dis- cussion of the observations.
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F. W. Grover (1911) studied this question.