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August, 1910 waves upon the rolling of the vessel, the following relation must subsist: 4 Vcos a= -- 21 How to Find the Undesirable Course With Any Given Speed. Thus, if the waves be 320 it. long and the vessel's natural period of rolling be five seconds, the right-hand member of the above equation will have a value of --8, and, therefore, V cos a must be equal to --8, so that V5 --8 y= --, and, if the heading of cos a the vessel be such that a = 60°, then V, the vessel's speed, would have to be 16 ft. per second, or approximately 9 knots an hour toward the direc- tion in which the waves are running; and. it will be evident that a. re- duction or increase of as mutch as 50 per cent in the speed would :ob- viate the synchronizing effect. In this manner we may find. the undesirable course with any given speed, and the undesirable speed with any given course, for a certain vessel among the waves of known dimen- sions. In summing up, it may be said that, as, tat'. as,. the interests of ocean transportation have been. subjected to loss on account of the excessive rolling of vessels at sea, these losses may be reduced or forestalled through the spreading among the mariners of a knowledge of the natural periods of rolling of the vessels which they are called upon to manage, through the ability on their part to recognize PROMENADE TAE MarRINE REVIEW the apparent periods of the waves which they meet during oceanic voy- ages, and through an avoidance, by intelligent choice of speed and course, of those conditions which promote excessive rolling through a corres- pondence between the period of the vessel's roll and the half-period of the waves. Vessels Lost During | Quarter Lloyds Register has just issued the list of vessels lost and totally con- demned for the period from Oct. 1 to Dec. 1, 1909. Including steam and sailing, vessels, 210, of 180,967 gross tons, were lost. .Of this number, 21 were abandoned at sea, eight broken up, nine burned, 23 foundered, 119 were . wrecked, 11 aré reported as missing and 17 were lost in collision. Of the total number lost, 84 were Steamers or 103,511 sross. tons.) OF this casualty list, 57 were owned in the United Kingdom and colonies, 32 in Norway and.27 in the United States. Sweden: lost 18, Russia 15, Germany '18 and France 14. * Revenue Cutter Perry Lost The revenue cutter Perry struck Tonki point, Ole St.Paul island, "one of the Pribyloff jgroup, on which the largest sealing rookery in Alaska is. situated, in-a dense fog, July 30, and is a total loss. [he officers and crew were taken off by the revenue cutters Tahoma and Manning. The SHADE DECK PROMENADE PROMENADE PROMENADE PROMENADE 327 Tahoma had a Japanese sealing schooner, seized for poaching, in tow when news of the wreck was received by wireless. The oificers on the Ta- homa and Manning ordered the aband- onment of the Perry as a total loss. The Perry is one of the oldest revenue cutters in the service on the coast, and was one of the fleet of the Unit- ed States revenue. cutters engaged in the Bering sea patrol. The.Perry was under orders to keep within the 3-mile limit close to the rookeries to prevent raiding by the Japanese seal- ers. She was built at Buffalo in 1884, was 161 ft. long, 25 {t..beam; With a displacement "of 451° fons. "She served on the great lakes until 1893, when she was taken to the coast, @ Berry Bros. Convention | Berry Bros. .ltd,, Detroit held 4 convention of its managers and sales- men on July 6, 7 and 8. About 65 of the traveling force attended. The convention presided over by James S. Stevenson, general. manager. At the conclusion of the business meeting each day trips were made to nearby resorts. On Thursday af- ternoon the party left Berry Bros. dock on a special boat' fora trp around Belle Isle and Peache islanu, proceeding to the Lighthouse Inn, where dinner was served, James C. Kelly, of New York, acting as toast- master. On Friday the party went to Joe Bedore's famous hostelry at the' "St. Clair "Mats: This "oceasion was marked by the reading of an original poem by Charles H. Smith. was TNING GALLEY PANTRY WARES rhs y Png : ey AG " SHELTER DECK ce . z 2 epthe po Lp Lio ED oe DED FO TT ] ota £ Sa 3 PT hy? + AY a Moat : a ¥ -- PROMENADE AS tt in ; [: [i fe fe SH (3 lieve fue 2 el, alll | fll fle a3 eS 1 oyle ee F * > Pio dal lal? aN De 78 7624 2B A 70 68 66 6462 6058 56 Gone Ls LS 96 94 92 90 88 86 a4 fe aout MOSH "a = Qs of At a Paar : it] est 2 a jee : ae 59 57 55 s C71 69 67 6563 61 95°93 91 (89 82.85 83 81 79 27 75 a eae e VOD TE aA aT Teel ET el ea ea ee a lee ei, G LK et lat to TE d Pio Flo Blo Mio Flo Fp Fin Fala Bite 4 eg a5 F o ad 4 oa wv MAIN DECK ¢? Cain. PLANS OF THE TWIN STEAMs?S PRINCE RupeRT AND PRINCE GEORGE. For description 'see page 302.