366 Thirty-First Meeting of the British Association. 
ny in conjunction with the solar spots; but whose nature and causes are 
in all other respects still wrapped in entire obscurity. We owe to General 
Sabine, especially, the recognition and study of these and other solar 
magnetic influences, and of the magnetic influence of the moon similarly 
or Atomic Theory, first discovered by our townsman, John Dalton. Sines 
the development of this law, its progress has been unimpeded, and it has 
: : 
a bleaching, dyeing, and even agriculture itself, if they had been 
another branch of this science, M. Tournet has lately demonstrated that 
the colors of gems, such as the emerald, aqua-marina, amethyst, smoked 
vance has recently been made by Bunsen and Kirchoff in the application 
const 
their discoveries as the commencement of a new era in analytical chemis- 
try, from the extraordinary facilities they afford in the qualitative detection 
of the minutest traces of elementary bodies. The value of this m 
