Các thông số thử nghiệm ở những khoảng cách khác nhau D từ các vòi phun và là trung tâm của khối lượng đo lường. D được đo bằng bội số của đường kính vòi phun. N là số phân đoạn vận tốc. | same year also a third line was opened to the Pacific by way of the Atchison Topeka and Santa Fé making connections through Albuquerque and Needles with San Francisco. The fondest hopes of railway promoters seemed to be realized. United States in 1870 Western Railways Precede Settlement. In the Old World and on our Atlantic seaboard railways followed population and markets. in the Far West railways usually preceded the people. Railway builders planned cities on paper before they laid tracks connecting them. They sent missionaries to spread the gospel of Western opportunity to people in the Middle West in the Eastern cities and in Southern states. Then they carried their enthusiastic converts bag and baggage in long trains to the distant Dakotas and still farther afield. So the development of the Far West was not left to the tedious processes of time. It was pushed by men of imagination adventurers who made a romance of moneymaking and who had dreams of empire unequaled by many kings of the past. These empire builders bought railway lands in huge tracts they got more from the government they overcame every obstacle of canon mountain and stream with the aid of science they built cities according to the plans made by the engineers. Having the towns ready and railway and steamboat connections formed with the rest of the world they carried out the people to use the railways the steamships the houses and the land. It was in this way that the frontier speculator paved the way for the frontier agriculturalist who had to be near a market before he could farm. The spirit of this imaginative enterprise which laid out railways and towns in advance of the people is seen in an advertisement of that day This extension will run 42 miles from York northeast through the Island Lake country and will have five good North Dakota towns. The stations on the line will be well equipped with elevators and will be constructed and ready for operation at the commencement of the
