From Salt Lake City to Ogden, the great centre of railway travel, where several lines converge, is but a ride of thirty-six miles. Here the train, which was very heavy, was divided into two sections, and, after some delay, we went on our journey with hopeful hearts. The Salt Lake Valley and the Great Salt Lake, which we had traced for a long distance, finally disappeared from view. The journey was begun from Ogden on what is known as Pacific time. There are four time sections employed in the United States, adopted for convenience in 1883,--Eastern, Central, Mountain, and Pacific. It is Eastern time until you reach 82-1/2 degrees west longitude from Greenwich, Central time up to 97-1/2, Mountain time till you arrive at 11-1/2, Pacific time to 127-1/2, which will take you out into the Pacific Ocean; and there is just one hour's difference between each time section, covering fifteen degrees. So that when it is twelve o'clock, midday, in New York city, it is eleven in Chicago, ten o'clock in Denver, and nine o'clock in San Francisco. You adapt yourself, however, very readily to these changes of time, in your hours of sleep and in other matters. One of the places of special interest through which we passed before leaving Utah is Promontory. Here the last tie was laid and here the last spike was driven, on the 10th of May, 1869, when the Central Pacific and the Union Pacific Railways were united and the great cities of the Atlantic seaboard and San Francisco at the setting sun were brought into communication with each other by an iron way which has promoted our civilisation in a marked degree. A night ride over the Alkali Plains of Nevada, famous for their sage brush, was a novelty, and in the clear atmosphere they looked like fields of snow.