131 
Ordinary Meeting, March 21st, 1865. 
R. Angus Smith, Ph.D., F.R.S., President, 
in the Chair. 
Ur. Joule described an instrument he had constructed for 
showing rapidly minute changes of magnetic declination. 
Pbooeedings Lit. & Phil. Society — Vol. IV. — No. 13.— Session 1861-5. 
