C O N T E N T S. 

 VOL. VIII. 



On Insolinic Acid. By Augustus W. Hofmann, Ph.D., F.R.S. 

 &c page 1 



On the Existence of Multiple Proportion in the quantities of Heat, or 

 equivalent alteration of internal space of bodies, caused by definite 

 changes of state as produced by Chemical Combination or other- 

 wise. By Thomas Woods, M.D 4 



Anatomical and Physiological Observations on the Organ of Vision, 

 for the purpose of ascertaining the alterations caused by section of 

 the Optic Nerve. By Augustus Waller, M.D., F.R.S. Part I. . 8 



On some of the Metamorphoses of Naphthalamine. By A. W. Hof- 

 mann, Ph.D., F.R.S. &c 10 



Account of Pendulum Experiments undertaken in the Harton Col- 

 liery for the purpose of determining the Mean Density of the Earth. 

 By G. B. Airy, Esq., Astronomer Royal 13 



Account of Pendulum Experiments undertaken in the Harton Col- 

 liery for the purpose of determining the Mean Density of the Earth. 

 By G. B. Airy, Esq., Astronomer Royal (concluded) 13 



A Description of a new Sphygmoscope, an Instrument for indicating 

 the Movements of the Heart and Blood-vessels ; with an Account 

 of Observations obtained by the aid of that Instrument. By S. 

 Scott Alison, M.D 18 



On the Vitality of the Ova of the Salmonidse of different Ages. In 

 a Letter addressed to Charles Darwin, Esq., M.A., V.P.R.S. &c. 

 By John Davy, M.D., F.R.S. Lond. and Edinb., &c 27 



Note on a new Class of Alcohols. By M. Aug. Cahours and A. W. 

 Hofmann, Ph.D., F.R.S. &c. Communicated by Dr. Hofmanu . 33 



On Periodical Laws discoverable in the Mean Effects of the Larger 

 Magnetic Disturbances. No. III. By Colonel Edward Sabine, 

 R.A., D.C.L.. Tress, and V.P.R.S 40 



