Westinghouse payed attention to the problems of railroad signaling. By purchasing patents to combine with his own inventions, he was able to develop a complete electrical and compressed-air signal system. In 1883 he began to apply his special knowledge of air brakes to the problem of safely piping natural gas, and within two years he obtained 38 patents for piping equipment.
Because of scale I am pretty sure
Answer:
1.sources 2.evidence
3.corroborate 4.effects
5.Geographic context 6.historical context
7.affects 8.enduring issues
Explanation:
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tokugawa leyasu ruled in the 1800 in japan
A cylinder seal is a small, round cylinder invented around 3500 BCE in the Near East. It was particularly important in southern Mesopotamia. Cylinder seals were usually engraved with written characters or figures, and were used for administrative purposes.
There were two ways in which the Mesopotamians used cylinder seals:
- Most Mesopotamian sylinder seals formed an image through the use of depressions in the cylinder surface. This type of seal is linked to the development of clay tablets, and produces an effect similar to that of sunken reliefs in Ancient Egypt.
- The second was as for the seal to print images using raised areas on the cylinder. These were often used to print images on cloth and other two-dimensional surfaces.