Between 1836-1914. ročghly how many people immigrated to the US?

What was charles townshends development of a crop rotation system important to the industrial revelotion

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?

Who had the idea that there should be 3 branches of government