Page:Great Neapolitan Earthquake of 1857.djvu/202

These values of $\mathrm {L}$, are all, for the mortar when yielding in cohesion. When observed to yield in adhesion, the coefficient in each case becomes 0.1,$\mathrm {L}$ for brickwork and 0.083,$\mathrm {L}$ for limestone. The values given, are also all for ancient and fully indurated (except 5 and 9) mortar; where the latter is under twenty-five years laid, the value of $\mathrm {L}$ should be taken (quam prox.) at 3/5 $\mathrm {L}$ in the table.

Proceeding now to