摘要
In the previous paper （Kexue Tongbao, 29 （1984）,8:308—312）, we have discussed the effect of two Schwarzschild black holes’ field on the area of the horizon and obtained the conclusion that the area of the horizon can be decreased. In this letter we shall calculate the proper area of the horizon and obtain the same conclusion. Suppose there are two Schwarzschild black holes m1 and m2 located at ρ=0, z=0 and ρ=0, z=Z in the Weyl coordinate system respectively. According to Formula （A. 1） in the previous paper, the line element on the two dimensional surface t=const, and r1= const.
