Thomas Wallace Knox,
The Boy Travellers in the Russian Empire
“ Thirty thousand poods are equivalent to one hundred and twenty-five thousand gallons; multiplied by twenty-four it gives the unprecedented yield of three million gallons a day. Estimating thirty gallons to the barrel, we have a well flowing one hundred thousand barrels of oil daily! This is something never dreamed of by the wildest petroleum speculator in America. A single well of the Baku district is producing more oil than the aggregate of all the petroleum wells in the United States. ”
