Possible Clues:

• Chemistry class poster, perhaps
• Where to eat, from time to time?
• Science class decoration
• Arrangement of chemical elements
• It begins with H
• Replicated bio (anag) — it has all the elements!
• He and I will certainly contribute to it
• The spread follows what I see at the end of an age, scientifically speaking
• Lab fixture
• Occasional story covering British elements in this