MINIMUM WAGE RATE TEXAS: $7.25 per hour. Texas adopts the federal minimum wage rate by reference. Any changes of the federal minimum wage will automatically affect the Texas minimum wage. Or approximately $290 per week. Based on a 8 hour day and 260 days work per year before taxes.
History of Radiography. X-rays were discovered in 1895 by Wilhelm Conrad Roentgen (1845-1923) who was a Professor at Wuerzburg University in Germany. Working with a cathode-ray tube in his laboratory, Roentgen observed a fluorescent glow of crystals on a table near his tube.
This idea was quickly applied to X-ray tubes, and hence heated-cathode X-ray tubes, called Coolidge tubes, completely replaced the troublesome cold cathode tubes by about 1920. In about 1906, the physicist Charles Barkla discovered that X-rays could be scattered by gases, and that each element had a characteristic X-ray spectrum.