See only the text posts on Tumblr

It appears that in the past this was possible but with a very recent change made it no longer work.

This DailyDot article explained how one could previously accomplish this:

8) Filter your dash by type by using "/show/[mediatype]".

Appending “/show/text” to tumblr.com will let you see only the text posts on your dash.

This also works for photos, links, quotes, audio, chats, and videos.

(Though I'm unsure if this applied to user's blogs or just tumblr.com)

One way in which you could allow for this to work in the future is to tag all of your posts with their media type (e.g. #text, #image, #video, etc.) and then add /tagged/text (for example) to the end of your blog's URL to view only those types of posts. You can use http://www.tumblr.com/mega-editor to easily add media-type tags to all of your old posts.