INDEX. 
659 
Spleen, on the development of, in the chick, 295. 
Stanethylium, oxide of, 420 ; sulphide of, 421 ; chloride of, 422. 
Stereoscope, the, and its effects, 5. 
Stokes (Prof. G. G.). On the Change of Refrangibility of Light, 463. 
Supra- renal glands, on the development of, in the chick, 302. 
Symbolic forms derived from the conception of the translation of a directed magnitude, 161 ^ 
Part I. General investigation of symbolic forms, 161 ; preliminary definitions, 163; symbolic 
representations of the effects produced by the translation of a directed magnitude, 169. 
Part II. Applications of symbolic forms, 180 ; geometrical applications, ibid. ; statistical 
applications, 182; applications to dynamics, 186; application to determine the correction of 
the earth’s rotation, &c., 192 ; application to determine the motion of a rigid body about its 
centre of gravity, 198. 
T. 
Thermo-dynamic engine, synthetical investigation of the duty of, 78. 
Thomson (Prof. William). Synthetical investigation of the duty of a perfect Thermo-dynamic 
Engine, 78. 
Thyroid gland, on the development of, in the chick, 305. 
Tin, action of, upon iodide of ethyl, 418. 
Tunicata, on the circulating fluids of, 656. 
U. 
Urinary secretion, on the manifestation of current force during, 283. 
V. 
Veins, rythmical contractility of, in the bat’s wing, 131. 
Victoria regia, on the anatomy of the stem of, 289. 
Vision, contributions to the physiology of. Part II. On some remarkable and hitherto unobserved 
phenomena of binocular vision, 1 ; perceived magnitude of an object as distinct from its 
retinal magnitude, 3; stereoscope and its effects, 5; conversions of relief, 10; pseudoscope, 
11 . 
W. 
Waterston (J. J., Esq.). On a General Law of Density in Saturated Vapours, 83. 
Wheatstone (Prof. Charles). The Bakerian Lecture : Contributions to the Physiology of 
Vision. Part II. On some remarkable and hitherto unobserved Phenomena of Binocular 
Vision, 1. 
AVilliams (Thomas, M.D.). On the Blood-proper, and Chylaqueous Fluid of Invertebrate 
Animals, 595. 
Z. 
Zinc, action of, upon iodide of methyl, 427. 
Zincamylium, 436. 
Zincethylium, 436. 
Zincmethylium, 427. 
