92 BULLETIN 695, U. S. DEPARTMENT .OF AGRICULTURE. 
to internal trade in the accounting. The shipments of potatoes be- 
tween these possessions and contiguous United States if any, are too 
small to affect.the results appreciably as applicable to contiguous 
United States, and hence are not added to imports or domestic ex- 
ports, as the case may be, begmning with the years mentioned, to 
determine the full movement into and from contiguous United States. 
The Philippe Islands have always been treated as a foreign country 
in the foreign trade statistics of the United States. 
YEAR.—Of production: Year of planting, growth, and harvest. 
Of foreign trade: Fiscal year beginning July 1. Hence, the year of 
production is approximately related to the year of foreign trade, of 
supply, and of consumption. 
PopuLaTion.—Confined to contiguous United States, June 1 ee 
mates for noncensus years before 1910, and also for 1910 and later 
years, the census date for 1910 being April 15 instead of June 1 for 
many preceding censuses; supplied by Bureau of the Census. 
ACREAGE.—Bureau of the Census: 1889 and later decennial census 
production years. For 1869 and 1879, census production divided by 
production per acre estimated by Bureau of Crop Estimates. Bureau 
of Crop Estimates: Estimates for noncensus years; for 1890-98 — 
1900-8, new estimates of acreage made in 1917. 
PropuctTion.—Bureau of the Census: 1849 and later decennial 
census production years to 1879. Bureau of Crop Estimates: Esti- 
mates for noncensus years; for census years 1889 and later, census 
acreage multiplied by yield per acre. 
PRODUCTION PER ACRE.—Bureau of Crop Estimates: Estimates by 
States weighted to compute United States average. 
FARM PRICE PER BUSHEL.—Estimates by States by Bureau of Crop 
Estimates multiplied into State production, and total United States 
value divided by total United States production, for all years, in- 
cluding decennial census production years. For date of December 1. 
TOTAL FARM VALUE OF PRODUCTION.—Farm price per bushel, esti- 
mated by States by Bureau of Crop Estimates, multiplied into State 
production; total value of all States for all years, including decennial 
census production years. 
Imports.—Gross imports to year beginning July 1, 1910; imports 
for consumption for later years; Bureau of horse and Gpraces: 
Commerce. Years begin July 1. 
Suppty.—From the formula of production plus gross imports to 
the year beginning in 1910, and plus imports for consumption for 
1911 and later years. Carry-over does not enter into the problem for 
the reason that potatoes are not a carry-over crop. 
DomeEstTic ExPORTS.—Goods produced or manufactured in this 
country from either domestic or imported raw materials; Bureau of 
Foreign. and Domestic Commerce. Years begin July 1. 
