It constitutes a fifth part of our atmosphere, a third part of water, and a large proportion of every kind of rock in the crust of the earth Hydrogen, which forms two-thirds of water, and enters into some mineral substances, is perhaps next.
(the earth Hydrogen; forms; two-thirds of water) (It; enters; into some mineral substances)
the earth Hydrogen It
forms enters
two-thirds of water
into some mineral substances