Six months later in London, Lower performed the first human transfusion of animal blood in Britain, where he "superintended the introduction in arm at various times of some ounces of sheep's blood at a meeting of the Royal Society, and without any inconvenience to him."
Šest mjeseci kasnije u Londonu, Lower je izveo prvu ljudsku transfuziju krvi u Engleskoj, gdje je nadzirao unošenje nekoliko unca ovčje krvi nekoliko puta na sastanku Kraljevskog društva, bez smetnji pacijentu.