SYSTEMS.--SEPARATION OF THE CHEMICAL AND NATURAL HISTORY METHODS.
Sect. 1. Natural History System of Mohs. 344 Sect. 2. Chemical System of Berzelius and others. 347 Sect. 3. Failure of the Attempts at Systematic Reform. 349 Sect. 4. Return to Mixed Systems with Improvements. 351
CLASSIFICATORY SCIENCES.
History of the Inductive Sciences, From the Earliest to the Present Time · The Wunder Library — complete classics, free to read, with narration.