You can see the contents Google doesn’t display for No-US-users (time period 1868-1922, moving wall) by using an US Proxy.
You can use a webbased anonymizer service like http://www.proxyking.com . Other such links see
Please take into account that most such services have download limitations making it impossible to download large Google’s PDFs.
Or you can install with a few clicks in your browser an US Proxy (find a proxy IP and port with e.g.
Please note that it may be helpful to change to “Basic HTML mode” to see the pages!
[Update: Screencast http://archiv.twoday.net/stories/6067526 ]