- Trustees' Academy
- Tunnels, method of drilling
- Unionists, Trades
- United States
- Upsala
- Valve
- Veitch, Dawick
- Vesuvius
- Volcanic Action
- around Edinburgh
- around Edinburgh
- action of Earth's remote history
- at Vesuvius
- craters at
- on the Moon
- Warrington workmen
- Warwick
- Watson, William
- Watt, James
- Welding of iron
- Westminster Abbey
- Whistler, Major
- Wilkie, Sir D.,
- Willow-leaf objects on sun
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