Lecturer on Comparative Anatomy at St. Bartholomew s Hospital. Commu- 
nicated by Richard Owen, Esq. F.R.S page 387 
XXIII. On the Ipoh or Upas Poison used by the Jacoons and other Aboriginal Tribes 
of the Malay Peninsula. By Lieut. T. J. Newbold, A.D.C. to Brigadier- Ge- 
neral Wilson, C.B. Communicated by P. M. Roget, M.D. Sec. R.S. . 42/ 
XXIV. Description of a new Barometer , recently fixed up in the Apartments of the 
Royal Society ; with Remarks on the mode hitherto pursued at various periods, 
and an account of that ivhich is now adopted , for correcting the observed height 
of the Mercury in the Society's Barometers. By Francis Baily, Esq., Vice-- 
President and Treasurer R.S. . 431 
Index 443 
Appendix. 
Meteorological Journal kept at the Apartments of the Royal Society, by order of the 
President and Council. 
ERRATUM. 
In announcing the Prize Questions for the Royal Medals to be given in the year 1838, as published in the 
Philosophical Transactions for 1835, Part II. ; 1836, Parts I. and II. ; and 1837, Part I. ; for “ Physics'” read 
“ Mathematics.” 
