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208 sels on this route as on the Lake Su- perior route. There can be no large error in assuming that the ratio between registered and freight tonnage for this one-fourth is also the same as that for St. Mary's Falls canal. Therefore, in- creasing the registered tonnage by 24 per cent, the estimated actual freight of De- troit river is 67,789,369 tons of 2,000 lbs. each. : ~The value of the freight passing St. Mary's Falls canal during the season of 1909 was found to be $10.81 per ton. Assuming this unit value for the Detroit river commerce, the total estimated value of the actual freight passing Detroit river during the season of 1909 would be $732,803,079. In addition, there are two remcrered passenger ferries, and five registered railroad: ferries that have not been in- cluded in the preceding tables, also there is a large number of unregistered power boats using the river. No complete rec- ord of these boats is kept; the exact number is not known. The insfector of hulfs reports that they have issued Pilot Rules to 850 motor boats. The collector of customs estimates the num- ber at "a thousand and upwards." The commerce passing the Detroit tiver has now been determined with great accuracy for eight consecutive years and is as follows: THE Marine REVIEW "SUMMER TOURS." . "Summer Tours" is the name of the latest tourist book issued by the Cleve- land & Buffalo Line. trade publications nowadays are Summer Tours occupies very high rank. in this particular. It is abundantly il- lustrated in half-tone while the letter press is printed in a brown tone. De- scriptions are given not only of various resorts contiguous to the company's service but of many which may easily be reached by collateral lines, for instance the great Muskoka -- region in Georgian bay and the limitless at- tractions of the Lake Superior country. It is surprising how much, information of real value is to be found in publi- cations of. this: character. man, general passenger agent, Cleveland, will send the book free to anyone upon receipt of six cents to cover postage. THE DOCK BUILDING ENTER- PRISE IN CANADA. According to a dispatch from Ottawa, Sir Robert W. Perks, who is a member of the Ottawa contracting firm of Mc- Arthur, Perks & Ce., Ltd., announces that, as the result of negotiations with the Canadian government, arrangements have been concluded for the construction me Number of . : : Freight Tons, Value, Year. - Passages. Net Registered Tons. Estimated. Estimated. Di cas Sec sien cats 33,000 39,328,689 44,260,506 $440,834,640 MOD ens 'a so ons sEGa RE he aes 33,113 37,453,796 46, 817, 245 471,917,830 TOON Ge oe ne 29,472 33,049,964 42,792,326 453,598,656 RI GCs ein aes 35,599 45,912,622 55,508,360 522,888,751 TOG oi ces 35,128 50,673,897 63,808,571 662,971,053 ares oo s Sau aaa 34,149 53,959,769 71,226,895 697,311,302 DOOR are. ase ee ee ee ies 27,883 40,628,850 54,086,750 614,425,480 oP Salea Sie 4 genes ee feres «aes te 32,296 54,668,846 67,789,369 732,803,079 The number of vessel passages has The net registered tonnage has increased 14,039,- 996 tons. having a tonnage greater than 100 tons. increased 4,413 over last year. There were 826 steam vessels Their average tonnage was 2,177 net registered tons, an increase of 121 tons over last year. _There were 321 sail vessels having a Their a de- tonnage greater than 100 tons. average tonnage was 681 tons, crease of 120 tons. The average regist- ered tonnage of all 'vessels using Detroit fiver during the season of 1909 was 1,693 tons--an increase of 236 tons over fast year, GENERAL SUMMARY. 'Net registered tons, Detroit ING NO eh. ns ooo co's 54,668,846 tons -Net registered tons, St. Clair plats. catial ©... 50,721,882 tons 'Total number of vessels..... 1,312 American vessels ............ 1,140 Canadian Vessels. go... ces ss oe 172 hea .VeERSels' 05 eo, ey 958 Ot VESSCIS 6 ts es is ce oe ck 354 Total number of vessel pass- OOS ce ig ie eee ek cae 6 32,296 Average tonnage of all vessels 1,693 tons Estimated actual freight...... Estimated value of freight... 67,789,369 tons . $732, 303, 079 of two immense dry docks capable of accommodating the largest warships or ocean steamers afloat. One of the dry docks is to be constructed at. Levis, on the bank of the River St. Lawrence, opposite Quebec, and the other at St. John, New Brunswick. Sir Robert Perks also states that arrangements have been made to provide both docks with a complete equipment of shipbuilding plant, the financing of this latter project being undertaken by Messrs. Harland & Wolff, of Belfast, the Canadian Pacific Railway Co., and Messrs. McArthur, Perks & Co. Incorporation has been granted to the Dominion Dry Dock Shipbuilding Co., which is to make this provision, and those who have formed the Corporation are: ' Lord Pirric (Messrs. Harland & Wolff, Belfast), Sir Thomas Shaugh- nessy (president of the Canadian Pacific railroad), Sir Robert Perks, Hugh Allan and W. Dobell. The Dominion government is reported to be favorable to increasing the govy- ernment subsidies towards the construc- tion of the dry docks from 3 to 3% per cent for 35 years on the cost of Among the finest specimens of the printing art issued and W. F. Her- also presumably for the same trade. May, 1910 construction as under: First class dry docks, capable of receiving the largest ships in the British navy, will be sub. sidized on a maximigm cost of $4,000,- 000 and receive annitally $140,000; sec- ond class docks, on a maximum of $i. 500,000, will carry a yearly subsidy of $87,500; and those of the third class, costing $500,000, will only have a grant of 3 per cent for 20 years, and receive each ea ne: 000. NEW MONSTER ORE CARRIERS NOW BUILDING. There are at the present time under 'construction in British yards six large ore-carrying steamers on Norwegian ac- count for the Canadian ore trade. W. Wilhelmsen, of Tousberg, Norway, has two building at Sunderland, one of 10,000 tons and the other of 12,000 tons, both of which are intended for the Canadian ore trade.. Messrs. W. Doxford & Sons, Sunderland, are building two huge ore- carriers also for Norwegian account and On the Tyne, there are also building two 10,000-ton ore steamers for Pet. Gron, of Laudefford (Norway), but it is sup- posed these are intended for the Lulea and Norvik ore trades. The Norwegian shipowners have shown remarkable en- terprise in getting into the Canadian iron ore trade. In the last three or four years, quite a number of large specially designed vessels have been built on the East Coast of Britain, for this trade, and nearly all of them for Norwegian owners. The orders before mentioned show that the Norwegians are. still pressing into the trade on which they already have such a strong hold. RIVALING THE CUNARDERS. It is known that the Hamburg-Amer- ican Co. has lately been in the market for two new steamers for its Atlantic service, and that the vessels are to be of mammoth proportions. According to advices from Berlin, the Hamburg-Am- erican Co. is about to place an order with the Hamburg branch of the Vulcan Works at Stettin for a new passenger and cargo steamer, 800 ft. long, with a displacement of 45,000 to 50,000 tons, and a speed of 20 knots. A dock of some 820 ft. long will be built for the accom- modation of the vessel. It is believed that if a second steamer is ordered, the well known firm of Messrs. Harland & Wolff, Belfast, will be the builders. The vessels, while designed to exceed the present express Cunarders in size, are evidently not intended to compete with them in speed. The fact that the engines are to be of the reciprocating type is also interesting to the advocates of its rival, the turbine, as well as to those who believe in the future of the combination principle.