High School Chemistry: Revised Edition. E-book. Formato PDF A. P. Knight   -  Forgotten Books, 2017  - 

Questions obviously arising out of the experiments, or such as a teacher would probably ask, for the purpose of developing his lesson, have been designedly omitted.

Chemistry for High Schools. E-book. Formato PDF A. P. Knight   -  Forgotten Books, 2017  - 

The elementary rules of the farmer's art are the simplest, and the rude practices of it the easiest; yet between the worst agriculture and the best lie agri cultural chemistry, the application of machinery, the laws of the economy of force, and the most curious.