Final answer:
The demand for mechanical calculators increased in late 19th century America due to the growth of businesses and industries, as well as the need for efficiency and productivity in offices and homes.
Step-by-step explanation:
The demand for mechanical calculators increased tremendously in America in the late 19th century due to the increase in size of businesses and industries, as well as the growth of office work. With the rise of industrialization and the expansion of business operations, there was a greater need for accurate and efficient calculations.
For example, the invention of typewriters, cash registers, and adding machines made it easier for businesses to keep up with the rapid pace of growth. Additionally, inventions like the vacuum cleaner and indoor water closets improved productivity at home and in offices. The time clock also played a role in increasing worker productivity.
Overall, the increase in business activities and the need for efficiency and productivity contributed to the higher demand for mechanical calculators in the late 19th century in America.