As mentioned previously Crellin's book on medical ceramics really left a positive impression on me because it was basically the only book I found that had pictures of what I was collecting and interested in.   Below is the bookcover and table of contents (1st page) incase you come across it in your travels and wonder if it is the same on that I am talking about:

I do not think that the actual collection is at the Wellcome Institute any longer and the book has long been out of print. 

Below is a sampling of the illustrations in the book of the collection and while there are ceramic feeders there are also other medical ceramics as well: