- The following dramatisation of the Marriage of Heaven and Hell and the introductory talk were originally broadcast on BBC Radio 3. The Blake Society is grateful to the dramatiser for making this available. As with all the recordings they are available for mp3 download on the Blake Society web site at www.blakesociety.org.uk/voice.
- Carbon (Wikipedia)
Carbon (from Latin carbo ‘coal’) is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. Carbon makes up about 0.025 percent of Earth’s crust. Three isotopes occur naturally, 12C and 13C being stable, while 14C is a radionuclide, decaying with a half-life of 5,700 years. Carbon is one of the few elements known since antiquity.