572 
APPENDIX. 
posed of particles, externally and internally heterogeneous, 
and also in a homogeneous body in a dissimilar medium. 
After rotation has been established, then, though the body 
should be spherical, and there exist no circumstance in its 
form to determine the direction of its magnetic axis, or axis 
of symmetry, he endeavoured to shew that this axis is de- 
veloped in the line of the axis of rotation, which imparts to 
the body a tendency to move towards another presenting a 
consecutive pole, or susceptible of such attraction ; and that 
hence a motion of progression, as well as rotation, will be 
established. 
,1829. Q A. Walker Arnott, Esq. V. P. in the chair.— The 
Jan. 31. , 
Secretary read Mr James Wilson's essay on the Origin and 
Natural History of the Breed of Domestic Dogs ; the object 
of which was to prove that the southern kinds have proba- 
bly derived their origin from the jackall, and the northern 
from the wolf. — The Rev. Dr Scot of Corstorphine then 
read a paper on the Pelican of the Sacred Writings. 
Feb. 14, Robert Stevenson, Esq. civil-engineer (formerly V. P.), 
in the chair. — Professor Jameson read extracts from a pa- 
per on the Geology of the Snowdon Elange of Mountains, 
as connected with its Scenery, Soil, and Productions, by 
James Stuart Menteath, Esq. younger of Closeburn. — The 
Rev. Dr Scot then read a communication on the Gourd of 
Jonah, shewing that it was probably the Ricinus Palma 
Christi, or Castor-oil plant of modern times. — At the same 
meeting, the Secretary read a notice regarding the Habits 
of the Ornithorynchus Paradoxus, by Thomas Axford, Esq. 
of Thorpe, New South Wales ; communicated by Mr Ro- 
bert Neill of Hobart Town, Van Diemen's Land. 
Mar. 28. Henry Witham, Esq. V. P. in the chair. — The Secretary 
