Mii na may iw included and contained in the crossings or inlcr-sections of each and every street, alley or other highway that crosses snid Fourth street, together with one-half tho cost and expense of such intersection! where any street, alley or other highway enters but doe's not cross said Fourth street, and one-fiftieth part of the tola! cost and exiiensc of the mi-duo of said improvement ilisl