TITLE: Link for "A spine for Teichmüller space", preprint by Thurston
QUESTION [5 upvotes]: Can someone please give any link or mention any source where I can find the following preprint. 
W.Thurston, A spine for Teichmüller space, preprint, three pages, 1986.

REPLY [3 votes]: You can find a quite detailed summary of Thurston's unpublished manuscript, which apparently is only three pages, as well as a critical discussion on page 13 and following of this 2014 paper by Lizhen Ji. I presume that an email to the author will get you Thurston's manuscript as well.