The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

July, 1918 Soo Canal Report Freight shipments through the Soo canal during the month of May showed a greater total by 2,596,153 net tons than those for May 1917. Shipments through the American and Canadian canals were 11,404,045 net tons, com- pared with 8,807,892 tons in May, 1917. The corresponding figures for the years 1916 and 1915, were, respectively, 12,- 293,476. and 7,348,567 net tons. Up to June 1, the 1918 movement totals 11,826,5334 net tons, an increase of 2,760,352 net tons over 1917, with ship- ments of 9,066,182 net tons. Compared with the June 1, 1916, figure of. 14,508,- 838 net tons, the loss is 2,682,304 net tONnS:< In May, 8,859,750 net tons were shipped through the American canal, and 2,544,295 net tons through the Canadian canal. The grain movement in May amounted to 10,820,022 bushels, and for the period ending June 1, the total was 17,344,698 bushels, a loss of 41,169,940 bushels compared with ship- ments to June 1, 1917, of 58,514,638 bushels. Detailed figures covering shipments to June 1, 1918 and 1917, are shown in the following table: EAST BOUND , To June 1, To June 1, 1917 1918 Lumber, M. ft. B. M. 23,524: 35,647 Flour,’ barrels. .0..0%4% 876,160 858,070 Wheat, bushels =..... 40,956,059 7,074,219 Grain;: bushels. 020... 17,558,579 10,270,479 Copper, net: tons. 0) ois 12,210 14,236 Iron ore, net tons.... 5,436,467 8,939,350 Pig. tron net tons aye enw eae aes o ee Gen’l merchandise, net TONS eis eek e see 12,068 10,403 Passengers, number .. 274 286 WEST BOUND Coal, soft net tons... 1,364,435 1,966,051 Coal, hard, net tons.. 334,802 166,155 Iron ore, net tons.... 15,883 14,671 Migd. iron and _ steel, Net? tons ose ee 15,047 7,917 Salts’ net tons: een: 119,279 "12,835 Oily? met: tons: 462164 eta eae 31,671 Stone, net tons....... BG 50,454 Gen’! merchandise, net EOUSE Me mec SS 169,675 54,641 Passengers, number... 246 327 SUMMARY : Vessel passages, No... 2,444 2,974 Registered tonnage,net 7,474,266 9,341,015 Freight : Eastbound, net tons... 7,148,838 9,522,139 Westbound, net tons.. 1,917,344 2,304,395 Total freight, net tons. 9,066,182 11,826,534 Handling Materials at Hog Island (Concluded from Page 279.) aftermost towers are 53 feet high, the next set 59 feet, the next 66 feet and the forward set 59 feet. The construction of the towers, to- gether with their foundations, sway bracing, etc., is clearly indicated in Fig. 1 which also shows details of the ways and the arrangement of the derrick booms. As _ this indicates, the distance from the in- ner’ line of derrick tower columns ( ‘on the ship. illustration | THE MARINE REVIEW to the side of the ship is 20 feet on the side where the spur track enters and 4 feet on the other. The ship itself is 58 feet beam. The _ keel blocks are ,5 feet high; in other words, the 1%-inch keel plates are 5 feet above the floor of the ways. These boats, of the 7500-ton type, are 40 feet deep to the shelter deck. From the shelter deck to the bridge deck their height is 8 feet 6 inches and from the bridge deck to the boat deck 7 feet 10 inches, making the total height of the ship above the keel plates 56 feet 4 inches. The derrick booms and masts are ‘Douglas fir 14x14 inches and 16x16 inches respectively. The masts are 40 feet and the booms 80 feet in length. These derricks havea capacity of five tons each.. The booms are trussed with steel rods as shown in Fig. 1. Electric hoists, which are located in hoist houses, on the tops of the derrick towers, were furnished by the Otis Elevator Co., New York. Each hoist is driven by a 37-horse- power, 60-cycle, 3-phase, 440-volt mo- tor. The operators’. pulpits are so arranged that each derrick man has an unobstructed view of the terri- tory served by his machine. Only the electrical equipment was furnish- ed by the Otis Elevator Co. The hoist mechanism itself was built by the American Hoist & Derrick Co., St oPatul, Each Slip Fully Covered ‘Fig. 3 shows the field served by each derrick. The: numbers, 1, 2, 3 and 4, indicate the number of derricks serving various areas over the ship. It will be noted that practically the entire ship is reached by two der- ricks and that the important areas are served by from three to four. Fig. 4 shows clearly how the derricks are employed for unloading the steel and delivering it to the proper point The whole arrangement is relatively inexpensive and simple and at the same time it is believed that it possesses maximum effective- ness. As previously mentioned, a_ stiff- leg derrick is set up on the ground at the head end of each set of ways for the purpose of handling and as- sembling extra heavy parts such as bulkheads which are too large to be assembled in the fabricating shops in the interior of the country. These ground derricks, which are of the stiff-leg type, have 66-foot booms and 36 foot masts. The booms are 14x16 inches and the masts are 16x16 inches. These derricks have a capacity of 12 tons each. Each of the seven fitting-out piers is amply equipped with traveling 313 cranes of the gantry type. The first, third, fourth, fifth, sixth and seventh - piers are each provided with four 25-ton gantry cranes. The second pier is equipped with four 35-tor cranes and in addition is provided with a 100-ton fitting-out crane under which a ship may be floated. This crane consists essentially of a sup- porting tower on the pier side, with a lattice truss over the ship and a relatively light lattice column _ sup- porting the outer end of the arm. The whole forms a gallows frame under which the ship is floated. The crane has a span of 110 feet over the ship and its height from mean low water to the under side of the lower chord of the supporting truss is lll feet.. This crane is equipped with a 100-ton electrically-driven main hoist and a 25-ton auxiliary hoist. From the foregoing it is seen that all of the ship-construction material at the Hog Island yard is handled by a simple combination of railroad freight cars, standard locomotive cranes and plain derricks. In its ele- ments, the scheme is relatively sim- ple and therefore efficient. On ac- count of the great size of the plant, however, a large number of units have been provided and the resulting operations are complex in the aggre- gate. An exceedingly high order of ability is necessary for their efficient administration. Lake Erie Receipts Out: -of “a total’ .of 8,792,251" tons shipped from upper lake ports in May, Lake Erie ports received 5,972,574 tons, as shown by figures compiled by THE Marine Review. The balance on dock June 1 was 5,650,059 tons against 4,121,- 305 tons on June 1, 1917. Detailed figures are: pa ; Port Gross tons Buffalo and Port Colborne 968,713 PSY aoa oe CN ees 190,034 Conneaut) Gatien a 854,101 Ashtabula: civ fates x 1,442,655 Painport.125 ice ae eae es 268,799 Cleveland 2 oct ceerc ts wae 1,184,031 eo tain es ein oe tae ees 481,946 EIU NOMS Wek eaase anaeis Greranent ais 187,366 MOled Ochs tice asaes eater ceo gestae 303,983 Wetroit Es nes ees weet 90,946 Totals: eis ean ess 5,972,574 — May Ore Shipments Shipments of iron ore from the Lake Superior district last month were 8,792,- 231 tons, the largest ever recorded in any May in history. Detailed figures follow: May, To June 1, Port 1918 1918 Escanaba tigers 655,495 655,495 Marquette) siiiitiewa ce 495,043 505,751 Ashland es eae 898,147 898,147 Superior. .\acgeea aoe 2,088,029 2,187,591 Dultithy sea sae eas 3,055,083 3,112,074 Two °dtarbors: oh sue. 1,600,434 1,669,043 Total onan aka owes 8,792,231 9,028,101 1918 “increase 97.6... 2,508,619 2,532,957