1st photo: 29th of December 1901.
For memory to my dear sister Yulia Augustovna (daughter of August) Weber from Yekaterina Philippovna (daughter of Phillip) Weber.
2nd photo: We were photographed in our yard in 1920. In the picture Mom, Fedya and one of our friend (woman).
Address on the envelope:
N. Pyatigorsk, Krestyanskaya street, 36 apt. 2. Uvarova N. I.
N. Pyatigorsk is Novopyatigorsk, now district of Pyatigorsk. The Krestyanskaya street is called Palmiro Togliatti street today. Here is that house in the map of Pyatigorsk -
https://www.google.ru/maps/place/Piatigorsk,+Kraj+Stawropols....
Uvarova is surname.
In the last photo is written: Mikhail 26 years.
Natalia.