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The Battle of Veii was a battle between the Romans, who were led by Marcus Furius Camillus, who had been elected dictator, and the Etruscan city of Veii. Veii had engaged the Romans in a long and inconclusive war during which it was often under siege.
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Battle of Veii.
Date:396 BC
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B - rading about the remains of an ancient statue.
While both A and C are very romantic, both would take ages for a professional working archaeologist to dig up anything useful in a reasonable amount of time. The most effective thing that he can do is read primary sources and based on those decide where a temple stood.
The steam engine of Thomas Newcomen and James Watt used the same principle of creating a vacuum and using steam to drive the device. The difference is that in James Watt's version, he uses a separate condenser to allow for a much greater efficiency in terms of power. The main difference with a separate condenser is that with a separate condenser, the main device can remain hot at all times, thus increasing efficiency.