90 Applications of the Igneous Theory of the Earth. 
| Win- ) First appearance | Obstructed Ice gives Open for 
ters. (of ice in the river.| or closed. Open again. way. j navigation. 
1825 ~ ‘| Dec. 18, ” 1826, Jan. 1 March 7 © 
1827 Dec. 23 3 
182g | Dec, 31 1828 Seb, re 
1830 March 9 
1831 | : Dec. 2 
*1832 | Dec. 21 Dec, 22 1832, March 5 March 10 
*1833 | Dec. 13 Dec. 14 1833, March 19 
*1834 | Dec. 14 Dec. 15 1834, Feb. 16 Feb. 26 
*1835 Nov. 29 1835 ; fan. 20 | March 16 
*1836 | Nov. 28 Dec. 2 Dec. 11 1836, March 28| April 2 
*1837 Jan. 1 1837, March 15| March 23 
an. 4 an. 5 
“] Dee. 9 Dee. 15 1993 330". S March a 
*1838 | Nov. 25 Nov. 27 : 
*1899 | § poinaitDete| Dec-17 | Til Dee. 16: f°. Feb. 27 | March 1 
1840, Feb. 19 Feb. 22 
Notes anp OCCURRENCES.—1635, see Gov. Winthrop’s Journal, 2d ed., Vol. I, 
p- 173. 1780, asevere winter. 1785, good sledding on the river March 24. 1786, 
mark March 21. 1802, mild winter. 1810, mild winter. 1816, river opens and 
shuts again twice. 1818, the ice carried away Hartford bridge, and Rarid’s store 
tory detained at the wharf one hundred days in the ice. 1837-8, mild winter. 
» 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. Laruror, of Hamilton College, Clinton, N. Y age 
In accounting for the secular changes of magnetic polarity on 
the principles of the prevailing geological theory, I attempted to 
show in Art. XI, Vol. xxxvin, 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 
oundation laid for unremitted and not irregular changes of con- 
tact of the particles of the fluid mass with each other, and with 
