The time break characteristics of both "SS" and "SSS" seismograph caps are discussed. Particular attention is given to the occurrence, length, and uniformity of the various time breaks over a relatively extensive range of firing currents. At the higher firing currents, the "SSS" caps do not show the "induction period" characteristic of "SS" caps, and at the lower firing currents, the "total cap lag" of the "SSS" cap is less than that of the "SS". Thus the "bridge break" and the "total cap lag" of this newer product are not only shorter, but they are more uniform than those of the older product ("SS" caps).

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