50, 100 & 150 years ago.

• Localización: Scientific American, ISSN 0036-8733, Vol. 317, Nº. 2, 2017, págs. 83-83
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The article discusses the impact of historical innovations and discovery in various industries of the U.S. Topics discusses include technological developments in the field of agriculture which includes chemical fertilizers, pesticides and plant breeding, efforts to preserve native wildflowers and wild plants and role of handling and quick-unloading of freight cars in industrial war mobilization.