Published in Edinburgh Philosophical Journal, in 1826, in volume 1, pages 78-81

Published in Edinburgh New Philosophical Journal, in 1826, in volume 1, pages 166-170

Published in Edinburgh New Philos. J., in 1826, in volume 1, pages 248-254

Published in Edinburgh New Philosophical Journal, in 1826, in volume 2, pages 121-141

Published in Edinburgh New Philosophical Journal, in 1826, in volume 2, pages 203-204