Секрет искусственного гранита Санкт-Петербурга практически разгадан... Фильм 9

This film shows several sources from the 19th century, in which granite is considered not only as a source of solid stone (granite boulders or blocks), but also as individual granite grains-crystals that make up its components, which have practical (national economic) significance. The bonding of these granite grains back into granite (artificial granite) was accomplished using... My main channel –    / @tamanskiy   Buy Alexander Tamansky's book "Another History of the Roman Empire," second edition, expanded: 400 pages, hardcover, over 300 illustrations – https://www.ozon.ru/context/detail/id... Video instruction "How to buy a book on Ozon" –    • Кто победил во Второй мировой войне и прич...   Video instruction on how to order on Ozon via smartphone –    • Как сделать заказ на OZON в 2022году?   Buy the book in English - https://www.amazon.com/dp/B0C2PH13BW Buy the book in Czech - https://www.zakazanevzdelani.cz/ Support the "Antiquity is the Renaissance" project: SBERBANK 4274 3201 0495 2448 Tinkoff 5536 9139 8285 3885 (Alexander Nikolaevich I.)