INDEX. 
657 
Glands (ductless), on the development of, in the chick, 295. Development of the spleen, 295 ; of 
the supra-renal glands, 302 ; of the thyroid glands, 305. 
Gray (Henry, Esq.). On the Development of the Ductless Glands in the Chick, 295. 
Grove (W. R., Esq.). On the Electro-chemical Polarity of Gases, 87. 
H. 
Hancock (Albany, Esq.) and Embleton (Dr. Dennis). On the Anatomy of Doris, 207. 
Heat, specific, of atmospheric air, experimental determination of, 72. 
Henfrey (Arthur, Esq.). On the Anatomy of the Stem of Victoria regia, 289. 
I. 
Insects, on the chylaqueous fluid in the larva of, 648. Blood-proper in, 650. 
Invertebrata, on the blood-proper and chylaqueous fluid of, 595. In Porifera, 601. Polypifera, 
602. Medusas, 603. Echinodermata, 605. Blood-proper in, 608. Chylaqueous fluid in, 
612. Entozoa, 619. Annelida, 622. Chylaqueous fluid in, 624. Blood-proper in, 630. 
Articulated animals, 645. Myriapoda, 646. Chylaqueous fluid in the larvae of Insects, 648. 
Blood-proper of Insects, 650. Crustacea, Arachnida, 652. Mollusca, 653. Bryozoa, 
655. Tunicata, 656. Gasteropoda, 657. 
J. 
Jones (T. Wharton, Esq.). Discovery that the Veins of the Bat’s Wing (which are furnished 
with valves) are endowed with Rythmical Contractility, and that the onward flow of blood is 
accelerated by each conti’action, 131. 
Joule (James P., Esq.). On the Air Engine, 65. 
L. 
Letheby (H., M.B.). Account of two cases in which Ovules, or their remains, were discovered 
in the Fallopian tubes of unimpregnated females, &c., 57. 
Light, on the change of refrangibility of, 463*. 
Lunar atmospheric tide at Singapore, 125. 
M. 
Magnetic disturbances, on periodical laws discoverable in the mean effects of, 103. 
Magnetic force, on lines of, 25. On the employment of induced magneto-electric currents as a 
test and measure of, 137. Delineation of, by means of iron filings, 156. 
Magneto-electric currents, as a test and measure of magnetic forces, 137. 
Magnetometers, automatic registration of, by photography, 1 9. 
Magnetometers (balanced), compensation of, 22. 
Malfatti’s problem, analytical researches connected with Steiner’s extension of, 253. 
Mammary secretion, on the manifestation of current force during, 284. 
* For the particular index of this paper see p. 562. 
4 Q 2 
