A guide to free images on the web

In a previous posting I have introduced you to the Wellcome Library collection.  

Wellcome images: c1890 steel arm

A Guide to Little-Known Image Collections with Millions of Free, Hi-Res Images is a useful blog which not only includes a link to the Wellcome Library collection but some more contains links to a number of other collections

It also shows you how to search on Google to only return images which are copiable.

Google’s Advanced Search form allows you to specify usage rights in your search so you can be sure to return results that match your preferred license.