It does not mention glass. Just windows. These would be openings that could be closed and opened, but that would have weakened the structural integrity.
This was a great article, thanks for posting. To all the anti-mormon trollers: Is it really so far fetched that a small group of people could cross the ocean in barges? Why don’t you post an article about some biblical story, like the great flood, Moses turning the Nile into blood etc... and then have a group of atheists attack the story, sound like fun? Can you explain all the details on how/why God completely covered the Earth in water but preserved one family and all the animals on the earth in one small boat? Also, you are simply regurgitating born again and anti mormon ideas over and over. Why don’t you try reading the Bible, and coming up with an original thought? Have a nice day.