SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Hatari
Lead Nitrate: Litharge Dissolved in Dilute Nitric Acid and Crystallised (Faraday 1830)
Faraday purified all his lead this way before making optical glass. Iron and carbon in litharge stained his glass and ate his platinum trays. Dissolving the litharge in nitric acid and crystallising the nitrate leaves those impurities behind.
Source: Faraday, On the Manufacture of Glass for Optical Purposes, Phil. Trans. 1830, paragraphs 14-17. He gives no amounts of acid or water. 166 parts of the nitrate stand for 112 parts of lead oxide. Ours: porcelain vessels for his earthenware. Lead compounds are poisonous: gloves, no dust, wash hands. Picture drawn by Youblob.
Kati
3 days
Maudhui hatari
Blueprint hii ina taratibu za hatari. Ingia na uwashe maudhui ya hatari katika mipangilio ya akaunti yako ili kuona maagizo ya hatua kwa hatua.
IngiaMchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.