Conversation so far:
What is the empirical test of pangenesis and Lamarckism?
Galton explicitly rejected the idea of the inheritance of acquired characteristics (Lamarckism).
Did he develop the empirical test?
he transfused the blood between dissimilar breeds of rabbits, and examined the features of their offspring.

Question: What was he hoping to prove by doing this?
Self-contained rewrite: What was Francis Galton hoping to prove by transfusing blood?