Series 1:
Earth and Air and Sky
Series 2:
Man's Closest Friends and Most Inveterate Enemies
Series 3:
Trees and other Plants Useful to Man        
Series 4:
Some Common Wild Flowers        
Series 5:
Among our Feathered Friends
Series 6:
Native Wild Animals
Series 7:
Life In and Around the Water
Series 8:
Insects, Helpful and Harmful