Abstract
Examinations were made on the variation of tablet weights in one lot and it was concluded that the difference in the volume of the die was the largest cause of the variation. The next great cause for the variation seemed to be the accidental error, while that due to the passage of time seemed far smaller than was expected. There was, however, no tendency for the variation to increase with prolongation of working time. Variation coefficients obtained were about 3.1 for the total variation, 2.4 for that by the dies, 0.7 for that by passage of time, and 1.9 for that by accidental error.
