Sandow's physical training system warm-up with dumbbells

Upon reading Eugen Sandow's books I found out that a trainee should do this warm-up before the main exercises of the system. I was unaware of this warm-up until I have almost finished the one before the last cycle with 8 kg dumbbells. So I rolled back to 4 kg dumbbells in order to get used to this important warm-up and go through cycles using these warming up exercises anew.