Silver tarnish is silver sulfide, which forms in the presence of hydrogen sulfide.
Pre-industrial sources for hydrogen sulfide include volcanic activity (e.g. hot springs), tanneries, sewage, manure, and hard-boiled eggs (YT video).
So, there were plenty of "odors" that would make silver tarnish back in the time, both in the city and in the countryside. ...
But he did not have to do that in such a clandestine, private manner. Using "admit" in the question title is a bit leading. He — among many others, it was absolutely no secret — wrote to that effect publicly from at least 1979 onwards.
Der angestrebte 'Mokkatasseneffekt', das war der Wunsch der währungsstarken Länder zur Verteilung der durch ...
I found it in a 1901 issue of Messenger of the Sacred Heart, a Roman Catholic periodical.
I was actually looking for another Lenin quote and somehow I found that source right before I found this site asking about it.
I guess actually it's "state" instead of "country".
The “divorce mills " are grinding our country to powder; for if you destroy the ...