Dr. Jacoby's Issues of National Geographic in Season One, Episode Six

In season one, episode six (#1.006, Realization Time), several issues of National Geographic can be seen on the floor beside the desk in Dr. Jacoby's office. This is as the psychiatrist receives a phone call from someone claiming to be Laura Palmer. 

Two magazine covers are visible.  

This site aided me in finding the two issues.

The first magazine is from February 1987. Jacoby was apparently reading up on Iceland due to Twin Peaks' recent visitors.

The second issue, which is from January 1987, is devoted to "Medicine's New Vision." Two articles are mentioned which might also feature Iceland, Ice On The World, and Glaciers On The Move.