Page:Great Neapolitan Earthquake of 1857.djvu/202

154 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