Synopsis
Spec references J247: B1.4d. Experiment by Julius von Sachs which involves testing for starch in leaves using iodine. Showed a leaf in sunlight, a leaf been left in the dark, and a leaf with one half in sunlight and one in the dark.
Similar broadcast resources

The Supereme Sacrifice
Documentary telling the story of how the 1914 Heart of Midlothian football team became the 'C' Company of the 16th Battalion of The Royal Scots in World War I.

02: Into the Abyss | Royal Cousins at War
The roles played by cousins Tsar Nicholas II of Russia, Kaiser Wilhelm II of Germany and King George V of England in the desperate, frantic summer of 1914.