Value of the ruble in year 1825 Would anyone know how to find out the value of the Russian ruble in the year 1825, in today's (2016) US dollars?
This website (in Russian) states that, in 1825,
you could sell 1 Imperial Ruble and get 0.72 US dollars. I don't know Russian so I cannot tell the source of that data. 

Those 0.72 US dollars in 1825 are worth US$15.49 in 2016, according to this website. 

Therefore, 1 Imperial Ruble of 1825 was equivalent to US$15.59 in 2016.

Additionally, this website has information of prices of different goods and wages for Russia since the 16th century.