The Donaldson Line, established in 1855, has for many years maintained a service between Glasgow and Montreal, its vessels ranging from sailers to some of the finest steamers entering the St. Lawrence River. Its present service is performed with the twin-screw steamers _Athenia_ and _Cassandra_, and nine single-screw boats; and another twin-screw boat, the _Saturnia_, is shortly to be delivered, and will be of about 8000 tons, the largest in the company’s fleet. The salient feature of the Donaldson Line passenger steamers is the carriage of one class of cabin passengers only, called second cabin. This enables travellers to enjoy the best the ships afford, the accommodation being equal to that on many long-distance steamers, such as those that go to Australia. Its first steamer to Montreal was the _Astarte_ in 1874, upon the withdrawal of the line from the South American trade in which it had been engaged up to then; and its Canadian service, fortnightly at first, became weekly in 1880. A line to Baltimore, Maryland, was established in the winter of 1886-7, and the winter service to Canada began with the Baltimore boats calling at Halifax on their west-bound voyages. No further attempt was made by the Americans to establish a line of steamers across the Atlantic until 1871, but in that year Messrs. Cramp of Philadelphia received orders for four large steamers of over 3000 tons each, and these with some English vessels maintained the service of the American Line. In 1884 the Red Star Line took over the line and ran the boats as cargo steamers. They were again transferred in 1893 to another American Line which three years later sold them. In the meantime, the later American Line ordered a number of vessels and, besides buying up the Inman Line, absorbed the Inman and International, which owned the steamers _City of Paris_ and _City of New York_. The new owners dropped the words “City of,” and also had two steamers built in America to comply with the Act of Congress under which the line was formed. The screw propeller was naturally not long in commending itself to the builders of ships for the long voyages to India and Australia. Mr. John Dudgeon, in an article published in 1856 on steam expansion and the suitability of expansion engines for long voyages, was almost prophetic in his remarks on the relative value of the screw propeller and the paddle-wheel. In the article he said: