SIM – Plate 32b
Plate 32, Fig. 61, 1% Iron sulphate and 1% Silver nitrate equal quantities mixed: Experiment carried out between 10 a.m. and 2 p.m. on the 21st of September: The characteristic arrow-like forms are visible. The top of the picture is strongly coloured by Iron sulphate and would normally show a stronger Silver nitrate activity. The left side is differently formed; the arrows are much more vigorously formed and grouped.But we must attribute this to the position of the various planetary bodies.