Book

1 1|       itself.But if the veins did exert a propulsive action when
2 1| explanation is thatthe kidneys do exert traction. ~ ~And how is
3 1|           no force.They obviously exert traction; for this is the
4 1| alternative.~ ~How, then, do they exert this traction? If, as Epicurus
5 2|          these parts will have to exert a greater amount of attraction,
6 3|     superior in strength, it will exert its activity upon its passive
7 3|        the heart itself that they exert their traction. For, by