1960's biology book. Illustration by Charles Harper.The book is "Learning with Colour - Biology - A colourful Introduction to the Wonder of Life" by Gerald Ames and Rose Wyler. Published by Hamlyn Publishing Group Ltd., Feltham, Middlesex, 1961.
Images of alchemical apparatus
Alchemical art / Sacred Geometry <3
the hand of the philosophers - alchemical drawing, 1773