Academic Search Complete and Science & Technology Collection provide full-text articles of scholarly journals.
Try the following searches in Academic Search Complete
The * truncates the word for example chem* will return results for chemical OR chemistry AND densi* will return results for density OR densities
Limit your search to Full-Text by check-marking the Full-Text Box.
A good place to search for scholarly articles on Densities is in PubMedCentral where you have access to full-text articles from the Journal of the American Chemical Society.
In PubMedCentral Search Box enter the following:
"Journal of the American Chemical Society" and densities
OR
Try searching by metal densities, gas densities, liquid densities and the "journal title"
"Journal of the American Chemical Society" and water densit*
(densit* will search for density OR densities)