б/а2014-11-252014-11-251869-11-20Scientific American. Vol. 21, № 21. – New York, 1869. – P. 321–336.https://escriptorium.karazin.ua/handle/1237075002/2456A weekly journal of practical information, art, science, mechanics, chemistry and manufactures.en-USResearch Subject Categories::HUMANITIES and RELIGION::History and philosophy subjects::History subjects::History of science and ideasResearch Subject Categories::HUMANITIES and RELIGION::History and philosophy subjects::History subjects::History of technology and industryResearch Subject Categories::SOCIAL SCIENCES::Other social sciences::Mass communicationNovember 20, 1869Scientific American. – 1869. – Vol. 21, № 21Other