POTATOES: ACREAGE, PRODUCTION, ETC. 3 
VALUES OF FOREIGN TRADE.—The values of imported articles 
‘subject to ad valorem duties are defined by the Act of Congress of 
June 10, 1890, as— | 
The actual market value or wholesale price of such merchandise as bought and sold 
in usual wholesale quantities at the time of exportation to the United States in the 
principal markets of the country from whence imported, and in the condition in which 
such merchandise is there bought for exportation to the United States or consigned to 
the United States forsale, including the value of all cartons, cases, crates, boxes, sacks, 
and coverings of any kind, and all other costs, charges, and expenses incident to plac- 
ing the merchandise in condition ready for shipment to the United States. 
The value of all other imports, whether subject to specific duty or 
free of duty, is determined also according to the law just quoted. 
The customs duty, if any, is not reckoned as a part of the import 
value. The value of domestic exports is their declared value at the 
time of exportation in the ports of the United States whence they 
are exported, which the law requires to be stated under oath, with 
penalty for misstatement. Tare included. 
Go.tp.—All values and prices have been reduced to gold for 1861- 
1878. 
POTENTIAL CONSUMPTION.—From the formula of production plus 
eross imports to the year beginning in 1910, and plus imports for 
consumption for 1911 and later years, minus domestic exports. The 
result stands closely for actual consumption in each year. No 
account is taken of stocks at beginning and end of year; potatoes 
are not: a carry-over crop. The computed consumption includes 
potatoes used for seed, for live-stock feeding, and for starch manu- 
facture, as well as for human food and the quantity lost in waste. 
AVERAGES OF 10-YEAR PERIODS.—If the average is derived from 
one column, the years represented are added and the total is divided 
by the number of years represented. A difference between two 
columns is for the years represented in both columns. 
If an average of averages or of percentages is computed, the years 
that are represented in both of the two base columns are added and 
one total is divided by the other, as indicated; except that produc- 
tion per acre and per capita progucuen per acre are unweighted 
means. 
Every average for less than 10 years is preceded by a* and that 
is preceded by a figure indicating the number of years represented. 
FOOD HABITS. 
So great es been the variety and abundance of foods in this 
country and the dominance of sectional food habits that potatoes 
have never reached a prominence in the national dictary that they 
occupy m some other countries. Among the different groups of 
States the dietary importance of this tuber varies enormously. In 
much of the South it is greatly subordinate to sweet potatoes, yams, 
