As some of you here might recall, I am currently
researching Isaac N. Vail and his Annular ring theory.
An interesting article which some of you may like to read is
"The Demise and Fall of the Water Vapor Canopy: A Fallen
Creationist Idea," by Glenn R. Morton
[ http://www.glenn.morton.btinternet.co.uk/canopy.htm]
I found this article very useful. One interesting point
presented in this article is that certain creationist
books promote Vail's theories without mentioning him,
referencing him, or giving him credit for the ideas.
The Watchtower used to endorse Vail's ideas completely.
They were presented in some slides of the Photo Drama
of Creation which portrayed the early stages of the formation
of the earth.
Currently, the WT says all such ideas are speculation, and
does not put forth any descriptive ideas concerning the "waters
above the firmament."
--VM44
(Added Note: Here are some scenes from the Photo Drama concering
the Earth's rings)