Proceedings of the Royal Philosophical Society of Glasgow, Volume 18/fr-ca/proceedings-of-the-royal-philosophical-society-of-glasgow-volume-18/20A45E38-04D9-4D1E-A29F-82A982C353BC.html20A45E38-04D9-4D1E-A29F-82A982C353BC
Proceedings of the Royal Philosophical Society of Glasgow, Volume 18