Yourig's modulus of elasticity E of single crystal of nickel was measured by a new microscopic method at room temperature. From E measured and the known value of compressibility of poly-crystal of nickel, the Voigt moduli were calculated. The results are as follow: s11.1012=0.724, s121012=-0.267, s44.1012=0.949: E[111]: E[100]=1.89, n[100]=1/1.75. These values are all given in C. G. S. unit.
