1900 के दशक से पहले, बड़े पैमाने पर ब्रुअरीज में किण्वन के लिए मुख्य रूप से किस प्रकार के बर्तनों का उपयोग किया जाता था?

In which year was the first permanent photograph successfully produced by Joseph Nicéphore Niépce?

Which of the following historical statements regarding soap manufacturing is true?

Until industrial advancements and isolation methods in the late 18th century, which component was not recognized or separated as an independent ingredient in traditional soap-making?