183 
of the West Hiding of Yorkshire. 1857-8. 8vo . — From 
the Society. 
China and its Trade. By John Crawfurd, F.R.S. 8vo . — From 
the Philosophical and Literary Society of Leeds. 
Sensorial Vision. By Sir J. F. W. Herschel, Bart. 8vo . — From 
the same. 
Annual Report of the Leeds Philosophical and Literary Society for 
1857—8. 8vo . — From the Society. 
On the Structure of Lecidia lugubris. By W. Lauder Lindsay, 
M.D. 8vo . — From the Author. 
Atti dell’ imp. Reg. Istituto Veneto de Scienze, Lettere ed Arti. 
Dal Novembre 1858 all’ Ottobre 1859. Tomo IV. Dis- 
pensa Terza. 8vo . — From the Institute. 
Transactions of the Botanical Society of Edinburgh. Vol. I. 
Part 3. Vols. II., III., IV., and V. Proceedings for 
1856. Sixth, Seventh, and Eighth Annual Reports and 
Proceedings for 1841—44. 8vo . — From the Society. 
Donation to the Museum — 
Geological Specimens from the Peak of Teneriffe . — By Professor 
C. Piazzi Smyth. 
Monday , 21 st March 1859. 
Professor KELLAND, Vice-President, in the Chair. 
The following Communications were read : — - 
1. On some First Principles of a Mental Science, deduced 
from Correlations of the Primary Laws of Matter and 
Mind. By Dr Laycock. 
The author commences his communication by showing the need 
that has arisen for a scientific exposition of the laws of thought in 
relation to the laws of life and organization. In all the practical 
business of society, as well as of the physician, the phenomena of 
life and mind are inseparably associated ; and consequently without 
such scientific exposition anything like a scientific application of 
mental philosophy to medicine and the sciences of human nature, 
