Every will shall be construed, with reference to the real and personal estate comprised therein, to speak and take effect as if it had been executed immediately before the death of the testator, unless a contrary intention shall appear by the will. (1844, c. 88, s. 3; R.C., c. 119, s. 16; Code, s. 2141; Rev., s. 3141; C.S., s. 4165.)