Page:Great Neapolitan Earthquake of 1857.djvu/396

312 and substituting for $$\mathrm{H}$$ its value $$\frac{V^2}{2g}$$ now we have for the "camine"   and for the south end wall  Therefore

solving we find and horizontal velocity $$V_{,} = $$ 8.03 feet per second and

The difference between the former calculation and this is = 0.627 feet per second, or little more than half a foot per second. If we take the mean of the two determinations we find There can be little doubt, that the small bit of brickwork imposed over the lintel block, of this "camine," in moving at first, along with the lintel, and with a longer radius at the commencement of the trajectory, communicated to the lintel block, a velocity slightly greater, than alone it would have been projected with, and that hence the velocity deduced from the measurements of the axes of $$a$$ and $$b$$, may be slightly in excess. The true maximum velocity