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AT HEAD OF THE LAKES. Duluth, June 24--Another record will be broken by the Duluth, Missabe & Northern docks for June. Already these docks have shipped over 1,500,000 tons of ore since June 1 and by the end of the month will have exceeded the 2,000,000-ton mark. Boats have been plentiful during the past week and _the prospect is good for the next few days. A large amount of coal con- 'tinues to arrive. The ore shipment fig- ures for the head of the lakes for, the week June 14-21 were as follows: Du- luth 487,574 tons, Two Harbors 337,759 tons and Superior 285,212 tons, a total of 1,110,545 tons. During the week a year ago Duluth shipped 357,960 'tons, Two Harbors 290,801 tons and Superior 210,203 tons, a total of 858,964 - tons or 251,581 tons less than this year. ihis year now has a margin of 1,395,- 044 tons over, 1906. The grain traffic continues very-light, receipts and shipments being as fol- lows: "WEEK ENDING JUNE 22. Receipts. Shipments. ANMCH Lye crs es. oe ee 387,363 851,300 WON ee he eee a eS 8,051 ees Ass oe eo oho toe coats 31,206 133,961 Ree Be ee ene 5 2,885 se aees PBAIOWR ee 34,467 8,455 Dee aes cs 111,177 262,875 IRON SITUATION. The first half of the year is closing with an: exceeding quiet market in iron and steel lines, but with no cause for alarm. Spot quotations for pig iron are lower, due to the furnaces' ability to furnish better delivery. Crude steel is easier. An adjustment of the nego- tiations between the Pennsylvania railroad and the Carnegie Steel Co. for the manufacture of the Cassatt rail at $33 is believed to be probable. New rail business is heavy. The agreement between the American Sheet & Tin Plate Co. and the Amalgamated Asso- 'ciation to maintain the present wage scale on sheets and tin plates precludes labor troubles for the coming year. -DETOUR FOG SIGNAL. Editor MarinE ReEvIEw:--A _ state- ment made in your issue of May 16, tends to convey the impression that the Detour fog signal is defective. The _ Detour, fog signal happens to have an unusually efficient and faithful keeper, and it is the best steam fog signal, so far as I know, upon the great lakes. Steam can be gotten up in from 10 to 15 minutes, and as a feed water heater is in practically constant -- service, the keeper' does not hesitate to blow the signal whenever there is. any possibility of its being needed. The author of the statement has ex- plained it by saying that he believed _there were silent zones around the sig- Same . THE Marine REVIEW nal... As soon as. this statement was made, I directed the master of the ten- der Amaranth to investigate the con- ditions locally, and he reports that with the full pressure of 90 pounds carried on the fog signal boiler, there is a small silent zone about 5% miles SE of the signal, and-a semi-silent zone which extends from quite close to the signal, a distance of about two miles. On all other courses run by the tender, the signal was audible at distances of over six miles. Lack of*time prevent- ed a longer investigation, but the facts. as reported by the master of the Ama- The officers of the Ashtabula Steam- ship Co. are: E. S. Henry, president; George A.. Gaston, vice president; E.° W..Savage, secretary and treasurer. These in addition to T. J. Renicke, H. A. McKinnon, Oscar Olsen and Alex- ander Hynd, constitute the board of -~ directors. BLUE BOOK OF AMERICAN SHIPPING. The 1907 edition of the Blue Book of American Shipping is just off the press. This book is the standard ma- rine directory of the United States. It nt He, t Aid v tf Deep awnistle oi 0! ersucye Semi dead zond, . a MAA EC , r Ss - Statute Miles, Daad 2006, 45° 50° = = ¥ = 2 vomiles. ranth, show that the signal is plainly audible at a sufficient distance to en- able careful navigators to orient them- selves, and that the one zone of abso- lute silence, covers a space which is usually traversed in the time between two blasts of the whistle, so that only two blasts could possibly be lost. A sketch herewith, shows the courses which were run, and the extent of the silent and semi-silent zones. CHARLES KELLER, Major, Corps of Engineers, U. S. A., Lighthouse Engineer. ANOTHER FREIGHTER. The Ashtabula Steamship Co., an organization composed of Ashtabula and Cleveland men is_ negotiating "with .the Great Lakes Engineer- ing Works for a steamer to come out in the spring of 1908 and to be 440 ft. over all, 420 ft. keel, 52 ft. beam and 28 ft. deep. Such a steamer will have a carrying capacity of 7,500 tons on favorable draught. contains the name of every vessel: of American register, together with the name and address of the owner. This list is complete and embraces coast, lake and river vessels. ~It contains a list of ship owners, ship, engine and boiler builders, power and _ pleasure boat builders, manufacturers of gas and gasoline engines, names and addresses of naval architects, marine engineers and vessel masters. It is, in fact, a complete directory of everything per- taining to American shipping, giving particulars of vessels of the United States navy, dry docks of the United States, heads of govertsment bureaus in the United States and Canada con- nected with shipping, public works con- tractors, wrecking companies, maritime associations, purchasing agents, super- intending engineers, in fact "a list in- valuable to those who desire to reach the marine field. The Blue Book of American Shipping is published by the Marine Review andis for sale at $5.00 a copy.