Original sentence: However, natural history was encouraged by the Industrial Revolution and the need to analyze rock strata (layers) to find  mineral deposits
Edited sentence: For instance, the work of Linnaeus was strongly motivated by the desire to improve the economical condition of the Swedish kingdom <ref>Linnaeus: Nature and Nation by Lisbet Koerner, published by Harvard University Press<ref>.However, natural history has been always encouraged by practical motives.Similarly, the Industrial Revolution prompted the development of the science of geology by the need to analyze rock strata (layers) to find  mineral deposits <ref> Barnes, Barry and Shapin, Steven (1979) Natural order : historical studies of scientific culture (Beverly Hills ; London: Sage Publications)<ref>