Are you asking what it is?
Answer:
By the time he left office in August 1857 to represent the territory in Congress, Stevens had "negotiated ten treaties providing for the quieting of Indian title to some hundred thousand square miles of land."
Answer:
c. civil service examinations
Explanation:
In order to fill government positions, the Tang, Song, and Ming dynasties all used CIVIL SERVICE EXAMINATIONS.
In ancient China, imperial examinations were used to select government officials using written examinations and this use of meritocracy was influenced during the Tang Dynasty.
The Tan, Ming and Song Dynasties all used examinations to test the knowledge of candidates on subjects like Chinese classics, poetry and administrative issues.
Adding the story would have been a good idea for others to help you.
Isaac Newton was creative in his use of prisms to show how white light is actually made up of multiple colors. He used logic in the way he presented his arguments rhetorically in order to convince readers of the correctness of his conclusions.
Newton was not the first to experiment with passing light through prisms to determine how light works. French philosopher Rene Descartes had done prism experiments of his own. But Descartes had thought that passing through a prism actually modified the light in order to produce the color spectrum. Newton correctly understood that when light refracted through the prism, it revealed the range of colors that were naturally in the light. He then used a second prism, blocking all but one color, to show that a single color passing through a prism was not modified in color. He also showed--by positioning the second prism differently--how the multiple colors of light could be recombined into white light again.
Newton's 1672 paper on light refracting through prisms established his reputation as a scientist. He continued to study light throughout his scientific career, publishing a larger work in 1704 on <em>Opticks </em>(as they spelled "optics" then).
