90 Applications of the Igneous Theory of the Earth. 



Notes and occurrences. — 1635, see Gov. Winthrop's Journal, 2d ed., Vol. I, 

 p. 173. 1780, a severe winter. 1785, good sledding on the river March 24. 1786, 

 thirty to forty vessels froze in the river preparing for sea in November. 1790, 

 mild winter. 1801, great flood twenty one feet three inches above low water 

 mark March 21. 1802, mild winter. 1810, mild winter. 1816, river opens and 

 shuts again twice. 1818, the ice carried away Hartford bridge, and Rand's store 

 at Middletown. 1824, mild winter. 1828, mild winter. 1832, steam boat Vic- 

 tory detained at the wharf one hundred days in the ice. 1837-8, mild winter. 

 1839, great flood eighteen feet above low water mark ; Jan. 28, part of Hartford 

 bridge carried away. 1840, a severe winter — navigation in the sound closed. 



The dates from 1832 marked* are from the observations recorded by J. B. ; the 

 rest have been drawn from authentic sources. There are some years of which 

 no record could be obtained. 



Art. XII. — Applications of the Igneous Theory of the Earth; by 

 Prof. J. H. Lathrop, of Hamilton College, Clintoii; N. Y. 



In accounting for the secular changes of magnetic polarity on 

 the principles of the prevailing geological theory, I attempted to 

 show in Art. XI, Yol. xxxviii, p. 68, that the igneous theory in- 

 volves, as a necessary physical consequence, a more rapid revolu- 

 tion of the earth's crust than of the central fluid. The same 

 reasoning applies to all the concentric spheres into which we 

 may suppose this fluid to be divided. Whatever the law of con- 

 traction may be, the acceleration of the diurnal velocity increases 

 from the centre outward. We have here, very obviously, the 

 foundation laid for unremitted and not irregular changes of con- 

 tact of the particles of the fluid mass with each other, and with 



