Answer:
If 19th-century science is defined by certainty, the experiments with advanced technology and the scientific studies would have been the poof of certainty.
19th century was a period when many ideas, theories and inventions were developing. This era was also known as a modern era of science. The result of the discovering and experimenting would have been recorded in the Journal, some of them still exist. So, there wouldn't have been any loss, whatever the scientists were putting forward were seen in the public. Some of the examples are the Steam Engine, Charles Darwin Theories, telegraph and telephone, medicines.
Many Americans oppose U.S. participation in World War II for a number of reasons:
1) Americans did not want to have anything to do with any more European Wars, as the US went back to isolationism after World War I.
2) Because of a mixed population, it was better to wait for a reason to declare war, as the population was divided in between the two sides.
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Women began to exercise more open and overt power, taking effective control of some sections of the country and working less through male relatives.