How science and nature combine to purify water in a reservoir. Micro-cinematography shows the bacteria present in the water.
#4Skilled Insect Artisans
#5The White Owl
#6Fathoms Deep Beneath the Sea
#10The Cuckoo's Secret
#11The Battle of the Ants
#12Winter
#15Busy Bees
#17The Plants of the Pantry
#18Floral Co-operative Societies
#22Scarlet Runner & Co
#24Peas and Cues
#25Plants of the Underworld
#26The Aphis
#28The Strangler
#31The World in a Wine-Glass
#33Dream Flowers
#36The Bittern
#38Magic Myxies
#41The Nightingale
#47Romance in a Pond
#50Gathering Moss
#54Brewster's Magic