INDEX. 885 



HuGGiNs (W.), Further Observations on some of the Nebulse, with a Mode of determining the Bright- 

 ness of these Bodies, 381. 



HuLKE (J. W.). On the Chameleon's Retina; a further Contribution to the Minute Anatomy of the 

 B^tina of Reptiles, 223. 



K. 



Ketones, constitution, &c., of certain, 59 (see Frankland). 



Lactic add series, 309 (see Fb.\nkland). 



Lunar-diurnal variation of magnetic elements, 441 (see Sabine). 



M. 



Magnetic observations, discussion of, 441, 453 (see Sabine). 



Matrices, theory of, 25. 



Matthiessen (A.) On the Expansion by Heat of Water and Mercury, 231. 



On the Expansion by Heat of Metals and Alloys, 861 . 



Maxwell (J. C). The Bakerian Lecture. — On the Viscosity or Internal Friction of Air and other 



Gases, 249. Postscript, 267. 

 Mechanics, fundamental views regarding, 361. 

 Moon, mass of, deduced from the tides, 642, 655. 

 Muscular fibre, development of striated, 101. 



N. 



Nebula, observations on, 381 ; mode of determining the brightness of, 392. 

 Nematoids, anatomy and physiology of, 545 (see Bastian). 



0. 



Ostrich Tribe, structure and development of the skull in the, 113 (see Parker). 



Owen (R.). On the Fossil Mammals of Australia. — Part II. Description of an almost entire Skull of 



Thijlacoleo camifex, Owen, from a freshwater deposit. Darling Downs, Queensland, 73. 

 Oxatyl, 342. 



Parker (W. K.). On the Structure and Development of the Skull in the Ostrich Tribe, 113. — Intro- 

 duction, 113; skull of Struthio, 114; Rhea, 128; Dromseus, 135 ; Casuarius, 152; Dinomis, 163; 

 Palapteryx, 170; Apteryx, 171 ; Tinamus, 174; Description of the Plates, 179. 



Plucker (J.). Fundamental Views regarding Mechanics, 361. 



Poinsot's mode of representing the rotatory motion of a free rigid body, deduction of, 767. 

 MDCCCXLVI. 6 U 



