Contains the entire 16th edition (1995) of Kaye and Laby's Tables of Physical and Chemical Constants. It is freely available from the UK's National Physical Laboratory, and includes important physical and chemical property data. Kaye and Laby Online is searchable, or may be browsed. Note: the site is an archived version as it is no longer being updated.
Landolt-Börnstein (LB). New Series. [Science Library Books QC 61 Z3]
Landolt-Börnstein (LB). 6th edition. [Science Library Books QC 61 L33]
Science of Synthesis. Houben-Weyl methods of molecular transformations. [Science Library Books QD262 .S35 2000]
Houben-Weyl. 4th edition. [Science Library Books QD 258 M44]