Maritime History of the Great Lakes

Marine Review (Cleveland, OH), 23 May 1907, p. 23

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' perience, even degree of declination being ver- tically under same, and the one hour angle standing for each degree of lat- itude, 49 degrees to 41 degrees, inclu- sively. The table to. be carefully examined to be appreciated. The Hydrographic Office azimuth ta- bles are for latitudes 40 to 50 de- grees, while the new tables cover 41 new will have . to 49 degrees, these latitudes taking in the entire lake region. The data in the government tables is for objects not having a greater declination than 23 degrees. In the new table the declination has been extended to 29 degrees, thus afford- ing the observation of the moon and planets in their various positions, and of 88 of the 150 navigational stars. The true bearings are given to the tenth part of a degree exact, which is sufficient for all practical purposes, ° and converts the labor of interpola- tion for time, declination and _lati- tude, into a brief, and after short ex- mental -process. The. ele- ments of latitude and declination are contained on the same page for 36 minutes of time, divided into nine epochs of 4 minutes each. The tables commence at 11 hours 56 minutes and continue till the rising or set- ting of the object. The government azimuths are given in degrees and min- utes Of arc. In the new. tibles 2a bearings decrease from the top tow- ard the bottom of the page; this be- ing on the assumption that the ob- ject is on the meridian as a starting point. The government tables start with the objects rising or setting. The azimuths for apparent noon have been excluded (the same as the gov- ernment tables), for as every naviga- tor is aware, the object is due south (true) at this moment, what latitude or declination may be. The azimuths are augmented by two maps and numerous auxillary tables, a proper description of which will be found under "Explanation and Use of the Tables.".. All parts of the tables are prominently exhibited before the student, by an abundant number of examples for practice, distributed over - all parts of the lakes, by selecting the important objects on the celestial sphere, and covering all subjects re- lated to azimuths. . This. renders' the publication an excellent guide for self- instruction. The author in his introductory says, among other things: no matter. s "Whatever has been: said in enum-- erating the undesirable features of the government azimuth tables for lake navigation, it should. be borne in mind that they have, and are doing "TAE. MaRINE. REVIEW loyal service, they hold the honor of being pioneers in the assistance of the navigator in his frequent task of ob- servation. Before their appearance, it involved a lengthy and. tedious com- putation to find the true bearings from altitudes of the bodies and chronometer. They have been freely used in the construction of this pub- lication, ' in "other words, they have been built upon, as it is to be hoped, that the present will be improved to serve future needs as they may oc- cur, for, azimuth tables have come to stay, and as long as iron and steel enter.into the construction of ships, the tavisator afford to be without them." cannot The sincere thanks of the author are due. to Dy Oscar Erickcon, as: sistant to Branch Hydrographic Of- fice, Duluth, who designed the first skeleton for the tables, for compu- tation and general work. Also to that excellent seaman and mnaviga- tor,, the. late Capt Robt. Snitch, for practical suggestions during the con- structive period of the publication. .Captains Hugh O. Miller, Neil Camp- bell, jJobw Pe Parke, ©. Ji Grant & D. Secord, J. P. Thompson and num- erous others took active interest in the work. The Marine Review takes pleasure in recommending this work to lake men, and heartily endorses the var- ious statements made in the author's introductory. Owners should see that their boats are supplied with them and that they. be used for the pur- pose intended. AROUND THE GREAT LAKES. 'The «steamer will be launched at the Lorain yard of the American Ship Builjding Co. on june 1. Fire broke out on the steamer Au- gustus B. Wolvin in Lake Erie last week, but was confined to the crew's bath-room. Work on the improvement of the breakwater pier at Milwaukee will be- gin next month. The pier will be lengthened by 1,000 ft. The Great Lakes Construction Co. will be given the contract for replac- ing 2,000 ft. of the breakwater at Buf- falo which was washed away by the storm last January. The Buffalo Dredging Co. and the Thomas Brown Dredging Co. were the lowest bidders for the work of straight- ening, improving and widening the Buffalo river. : President Wm. Livingstone of the Lake Carriers' Association received advices from Ottawa this week that Leland $.. DeGract 23 the Canadian government has decided to build a lighthouse at Jackfish Bay. The, schooner S. B. Pomeroy which sprung a leak and went to the bottom at Lorain -a week ago, has been pumped out by- the sand _ sucker Charles Reitz and floated. The steamer Caledonta was fe- leased from the Middle Ground by the Reid Wrecking Co., after lighter- ing 500 tons of ore, which was later reloaded upon the steamer at Sarnia. At a meeting of the stockholders of the Cleveland & Buffalo Transit Co. held on board the steamer City of Erie on Saturday afternoon last, it was decided to defer the building of the new steamer for the Cleveland & Buffalo route. It is not probable that contract for the construction of this -- steamer will be awarded during the present year. The Canadian. government will have charge of the movement of vessels at the Lime Kiln 'crossing until the rules proposed for this crossing are approved by the Canadian and Uni- ted States governments. This was de- cided after a visit to the crossing by President Livingstone of the Lake Carriers' Associatfon, Commander Spain of the Dominion government, Col. .Charlés E. Ii 3B. Davis, United States" engineer, and Harry Coulby, president of the Pittsburg Steamship Co: Capt.' Frank H. Hackett of the tug Home Rule has been appointed 'by Commander Spain to direct the passage of vessels. Upbound vessels will be required to take the easterly channel and downbound vessels the westerly channel through the rock cut. The Standard Contracting Co. of Cleveland has been awarded. con- tract by the Pennsylvania Railroad to build a steel and timber dock on the site of the old Haskell dock just be-. low the swing bridge at Ashtabula. The old Haskell dock was abandoned some years ago, owing to the fact that it was impossible for vessels to pass through. The new structure is not intended for commercial purposes, but merely as protection to the bank. The steamer Saxon of the Pitts- burg Steamship Co.'s_ fleet which stranded on Caribou Island in a fog. was not badly injured. Her forepeak and forward compartment was full of water,. Capt. W. W. Smith; marine superintendent of the Pittsburg Steamship Co., took charge of the operations of salving the Saxon with the lighter Rescue. After jettisoning part of her cargo the Saxon was re- leased and proceeded to the lower lakes with her cargo of iron ore. She will be repaired at Toledo.

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