THOREAU 19 1845

20 20

18

1915 6

1912 10

1913 6 12

30

1923 5 26 9 1 50

I.G. I.G. Inc.

1929 269 10

1933 10 20

1940 12 12 16 2 25

1930

CUFORHEDAKEBRANEFUDE CU-FORHEDAKE CUREFORHEADACHE BRANE FUDE BRAINFOOD

19 80

1934

3 3

20

1931

21

1960

ASI 500 420

1983 1

3 3 3 3 3 3 3 3 3 3

1986 9

8000

1948 1975 26 7 53 20

[( O E) 1+ ( O E) 2+ Λ + ( O E) n].

1990