Volumes 1-238 of Mass. Reports are now available full-text on the web, thanks to the scanning efforts of the Google Books Project. Unfortunately, the search interface is a challenge, so to make them easier to find, we've created a page of Early Mass. Reports which links to all the volumes we have been able to find. Volumes are in PDF format and can be dowloaded or searched. You can also choose to view (but not dowload) a text version.
We could not find them all, so if you are able to locate any of the volumes we haven't linked, please let us know.