Urine - once useful, now "waste" - anth >> .
Diluted urine as fertilizer in (modern) garden > .
https://youtu.be/6DJloHh_ZYc?t=460 .
Urine as fertlizer ..
Urine = Philosopher's Stone? - The Story Of Science
https://www.youtube.com/watch?v=ZTb640Rbq74
Alchemy to Chemistry
https://www.youtube.com/playlist?list=PL-vRsHsClLJ6F73gzDgBl5Vd7TjGxbBpU
Urine - once useful, now "waste" - antharch
https://www.youtube.com/playlist?list=PLEFMsUiiH1132TkqXO83sVmP3DLfE2AHD
Discovery & Invention : Scientific & Industrial Revolutions - archanth
https://www.youtube.com/playlist?list=PLrYzzr8yja6E51qVCOwX9nNCkqK4aCfAM
Natural Philosophy to Science playlist
https://www.youtube.com/user/heterodoxism21/playlists?sort=dd&view=50&shelf_id=11
Chemistry - CrashCourse
https://www.youtube.com/playlist?list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr
