Q1. What materials were employed in the original lighthouses, before the use of oil lamps and electricity? 🔥
- Coal and wood fires[1]
- Argand lamps
- Electric arc lights
- Mineral oil
Answer: Coal and wood fires
Q2. Which of these materials was used by William Hutchinson to create reflectors in the Portpatrick lighthouse? 🪞
- Mirrors of perfect polish
- Small pieces of ordinary looking-glass[1]
- Cylindrical wicks
- Mirrors of mirrors of perfect polish and a better shape
Answer: Small pieces of ordinary looking-glass
Q3. Which of these materials was used in the construction of the Tour d'Ordre at Boulogne? 🧱
- Molten lead
- Gray and yellow stones and tile-red bricks[1]
- Tallow
- Silver and concrete
Answer: Gray and yellow stones and tile-red bricks

Early Lighthouse Materials

Explora temes relacionats