Named rows in a table (data frame) read from a file

I read a table as follows:

F1 <- read.table("Rtext3.txt")
F1

Price Floor Area Rooms Age Cent.heat
a 52.00   111  830     5 6.2        no
b 54.75   128  710     5 7.5        no
c 57.50   101 1000     5 4.2        no
d 57.50   131  690     6 8.8        no
e 59.75    93  900     5 1.9       yes

As it is seen, the rows have a name. However I don't know how to access a 
particular element from that name, for instance,

attach(F1)
Price

[1] 52.00 54.75 57.50 57.50 59.75

Price[["a"]]

Error en Price[["a"]] : sub?ndice fuera de  los l?mites

Price$a

Error en Price$a : $ operator is invalid for atomic vectors

Price['a']

[1] NA

Price["a"]

[1] NA

If I cannot access particular elements of the frame components by the row names, 
is there any use of having the rows named?

Thanks,

Sergio.