400. That’s an error.

Google cannot redirect you to http://www.amazon.com/exec/obidos/external-search/?field-keywords=Verhandelingen+der+Koninklijke+Akademie+van+Wetenschappen+te+Amsterdam,+Afdeeling+Natuurkunde&index=books because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.