Methods To deduce the shape and size of the surface made by a hammer on a human body according to the injuries and features of the skull fractures in the case,and features and differences of the injuries on the skull caused by the different ends of a hammer could be confirmed by imitating experiment on the body sample.

This paper expounds the correspond relation between spring flow and the precipitation, and proportion relationship between the rainfall amount and spring discharge, according to analysis and calculation of hydrology data for years in Nipple spring region.