1. Thomson, J. (older brother of Lord Kelvin), Phil. Mag., Ser. 4, 10, 330 (1855); summarized in J. C. Maxwell's article on “Capillary Action”, “Encyclopædia Britannica”, ninth ed. (Samuel L. Hall, New York, 1878).
2. See Quekett, J., “Practical Treatise on the Use of the Microscope”, third ed., 483 (H. Baillière, London, 1855).
3. Weber, E. H., Ann. Phys. (Poggendorff), 94, 447 (1855).
4. du Bois-Reymond, P., Ann. Phys. (Poggendorff), 104, 193 (1858).
5. Lüdtge, F. H. R., Ann. Phys. (Poggendorff), 137, 362 (1869).