Simplicity of the apparatus used in his successful experiments.
Some of the results obtained by him in his experimental researches.
What is to-day owing to him for his discovery and investigation of all forms of
magneto-electric induction.
His discovery of the relations between light and magnetism.
Action of glass and other solid substances on a beam of polarized light.
His paper on "Magnetization of Light and the Illumination of the Lines of Magnetic Force".
His contribution (1845) on the "Magnetic Condition of All Matter".
Investigation of the phenomena which he calls "the Magne-crystallic force".
Extent of his work in the electro-chemical field.