Sentence:  Hence, factually and mathematically, the cogeneracy, intimate relation and actual likeness existing between the earth's life-blood and man's clearly appear in proportions of about 95 to 5, since animal blood consists of about 95 per cent. water—a fact which, in turn, may prove water at least 95 per cent. more <WSD>lifeful</WSD> than human blood, which, excepting water, seems essentially to appear the most <WSD>lifeful</WSD> substance yet found — save and except, possibly, iron, which, though hitherto considered "dead," proves an enlivener of coursing blood, water, and hence animal life. 
Meaning of the word marked with <WSD> tags:  Bestowing life; enlivening. (from 13th c.)