British Association for the Advancement of Science. 281 
The most important part of our trade with America consists in 
our exports of manufactured goods. The following table exhibits 
the declared value of those exports in each year from 1805 to 1836, 
with the exception of 1812 and 1813, the records for which two 
years were destroyed at the burning of the Custom House in Lon- 
don.* 
Declared value of British and Irish produce, and Manufactures, ex- 
ported from the United Kingdom to the United States of America, 
in each year from 1805 to 1811, and from 1814 to 1836. 
Years. Amount. Years. Amount. Years. Amount. 
1805 | 11,011,409 | 1817 |6,930,359| 1827 | 7,018,272 
1806 | 12,389,488 | 1818 |9,451,009| 1828 | 5,810,315 
1807 | 11,846,513 | 1819 |4,929,815] 1829 | 4,823,415 
1808 | 5,241,739 | 1820 |3,875,286] 1830 | 6,132,346 
1809 | 7,258,500 | 1821 |6,214,875] 1831 | 9,053,583 
1810 | 10,920,752 | 1822 |6,865,262] 1832 | 5,468,272 
1811 | 1,841,253 | 1823 |5,464,874] 19833 | 7,579,699 
1814 8,129 | 1824 |6,090,394|] 1834 | ~ 6,844,989 
1815 | 13,255,374 | 1825 |7,018,934] 1835 | 10,568,455 
1816 | 9,556,577 | 1826 4,659,018] 1836 | 12,425,605 
One thing which cannot fail to strike any one on inspecting this 
table, is the large amount of our exports in the three earliest and 
two latest years of the series, when compared with those occurring 
in the intermediate years. ‘The extent of the shipments in 1815, 
Mr. Porter considered as the result of the renewal of commercial 
intercourse after the war. The years 1805, 1806, and 1807, 1835, 
and 1836, followed long periods of friendly intercourse. ‘The seri- 
ous falling off that occurred in 1808 and 1809, Mr. Porter, as al- 
ready stated, attributed to the effect of our celebrated Orders in 
Council, issued in retaliation for Napoleon’s Milan and Berlin De- 
crees. Nearly one third of our foreign export trade in 1805, 1806, 
and 1807, was carried on with the United States. 
The high degree of importance to each country of the trade which 
it carries on with the other, was shown in Tables appended to the 
Memoir. The proportions. which that trade bears to the entire for- 
eign trade of each country are as follows: . 
* This omission is less to be regretted, because of the unfortunate state of hos- 
tility into which the two countries were plunged during those years. 
