This is a link to an article in the June 1934 issue of Popular Mechanics magazine about the Mount Wilson Observatory, published just after the observatory was opened.

http://blog.modernmechanix.com/2008/08/01/the-worlds-biggest-eye/?Qwd=./PopularMechanics/6-1934/biggest_eye&Qif=biggest_eye_0.jpg&Qiv=thumbs&Qis=XL#qdig

Looks like the Museum of Jurassic Technology really does have some of its facts right.