18
votes
6answers
1k views
+50

How accurately could ancient astronomers find latitude and longitude?

In classical times (let's say 200 BC to 400 AD), how accurately could a Greek/Roman/Babylonian/etc. astronomer determine their location on the earth by coordinates like latitude/longitude? Could they ...
13
votes
2answers
233 views
+50

Three rings (wreaths?) symbol in XIX century Russia

On some buildings in Moscow (and other cities in European part of Russia) there are carvings of three interconnected wreaths. For example, some are on the Pushkin Museum building on Prechistenka: ...
1
vote
1answer
66 views
+300

Where can I find annual population estimates for each US state, from 1865-1899?

For 1900 onwards, the US Census Bureau has population estimates for each US state, for each year. There are also decennial censal counts for 1860, 1870, 1880, etc. But where can I find population ...