Note 173 — Chapter X
Reading edition
Cavallo, On Magnetism.—Cavallo was the first who noticed the influence of heat on Magnetism. Consult On the anomalous Magnetic Action of Hot Iron between the white and blood-red heat: by Peter Barlow, Esq.—Philosophical Transactions, 1822, p. 124. Treatise on Magnetism: by Barlow.—Encyclopædia Metropolitana.