Here is a quick link in tinyurl format for Philosophy E-Journals available via the U of M Libraries E-Journals page.
http://tinyurl.com/23fcqt
You can also search for a word in a journal name on the E-Journals site (example ethic)
You can search for a particular article within an electronic journal by clicking on the Citation Linker tab on the E-Journals site
For general searching by author, subject etc. for philosophy journals regardless of format (not limited to electronic) search the index of your choice listed on the Philosophy subjects page.
