The working cause; that cause which produces effects or results;an intervening cause, which produces results which would not have come to passexcept for its interposition, and for which, therefore, the person who set in motion theoriginal chain of causes is not responsible. Central Coal & Iron Co. v. Pearce (Ky.) SO S.W. 450; Pullman Palace Car Co. v. Laack, 143 111. 242, 32 N. E. 2S5, IS L. R. A. 215.