Author

William Richard Hodgkinson

2 books found

Placeholder cover for Valentin's Practical chemistry

Valentin's Practical chemistry

William Richard Eaton Hodgkinson · First published 1908

Placeholder cover for Pigmentum nugrum, the black colouring matter contained in hair and feathers

Pigmentum nugrum, the black colouring matter contained in hair and feathers

William Richard Hodgkinson · First published 1877