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38 TAE MARINE REVIEW ARBECAM'S COMPASS. A meeting was held Nov. 14 in the offices of Capt. Huntington, 150 State street, Boston, to make tests of the accuracy and the merits of Arbecam's alidade deviation correcter, position, distance and deviation finder, the new instrument which is being placed upon the market- this winter. Among those present were Capts. Coleman, Clark, Huntington, Lavender, Arbecam, and Cookum, beside sev- eral local compass adjusters and others. The tests with the instruments all acknowledge to be eminently success- ful. It was possible instantly to correct any deviation of the compass and in an incredibly short time tell if there was any deviation to correct. The compass was next adjusted with the instrument and then Capt. Huntington practically destroyed the compass and demonstrated his ability to run his ship entirely without the aid of a compass at all, relying solely upon the newly patented appliance to take its place. He was entirely successful in every demonstration that he made. Only one instrument was mentioned as being at all in the same class as the Arbecam instrument and finally its advocate admitted that it was not a compass deviation correcter and could not be used'in places where the Arbecam's instrument was suitable to do the work. The _ instrument mentioned was of English make. In order to "make the Arbecam instrument adapted to the great lakes, they decided to make the deviation corrector extend up to 30 degrees instead of 15 degrees as at present, as fre- quently where there is a large load of ore on a vessel the deviation will amount to more than 15 degrees. The instrument is further going to be placed in a box without being taken apart, in this way the instrument can be set up ready to use in less than half a minute. The box is 74 in. x 3% in. x 6% in., and with the instrument complete does not weigh over 10 lb. The triangulation plate is to -be made in accordance with the English. compass extending from zero to 180 degrees on a side instead of running from zero to 360 degrees. All present decided that the instrument was, in its present shape, adapted to the best interest of all navigators, and that it was a per- fect instrument for the uses intended. Full explanations of the instrument and its uses in the form of a booklet can be had by applying to B. V. How, 106 Tremont street, Boston, Mass. ERIE'S CHICAGO LIMITED. New York, Dec. 6.--The Chicago Limited over the Erie Rail- road now leaves Jersey' City every day a completely and throughly sterilized train. A device has. been perfected by 'Chemist Landon of the mechanical department by which all 'the cars on this vestibuled train are thoroughly sterilized at Jersey City after each round trip between Jersey City and Chi- cago, a run of about two thousand miles. The daily routine of sterilization began on Wednesday of this week. Experi- ments looking to this method of so cleaning cars as to kill 'all disease germs and destroy all bad odors, have been in pro- gress nearly a month. The Pullman Company has investi- gated the method and has givenits consent that all bedding, clothing and hangings in their cars used on these trains, be submitted to the sterilizing process, as they are satisfied it kills all disease germs, injures nothing in the cars and makes traveling in such sterilized cars absolutely safe in preventing disease infection. ~The process devised by Mr. Landon, consists of the mixing of two chemicals so that a sort of formaldehyde gas bath is given to each car, which is tightly closed for the purpose at the end of each trip. After the gas has been permitted to do its work, the cars are thoroughly aired, swept, washed and later on dusted, so that each car leaves the station guaranteed to be absolutely free from germs of la grippe, tuberculosis, fever or other contagious diseases, that any passenger may have left behind him. - This sterilizing process will be used for the present on trains No. 3 and No. 4, and as soon as arrangements can be perfected, -will be extended to other through trains on the line. A deodorizing apparatus has also been devised, that for the past two weeks has been in use in fifteen Erie club, parlor and commuter's cars. This apparatus is placed under the seats in the cars, out of sight of passengers, and gives off an odorless gas, which combines with the stale tobacco smoke, or other offensive odors which may accummulate in the cars, and serves to completely nullify them. This treatment has been so effective that it will be extended to all the passenger cars in the Erie service. It is an entirely new process and one that has never before been attempted in railway service. The chemicals used give Off no perceptible odor, so that after a night's treatment, the air in the cars is as fresh and cleanly as that out of doors, a fact which has been noted and com- mented on by some Erie passengers within the past week or 'two while experiments have been in progress. NEW REVOLVING CLAM-SHELL DREDGE. The Dunbar & Sullivan Dredging Co., Buffalo, N. Y. have about completed a new revolving clam-shell dredge which will be ready for operation next spring, and which it is un- derstood is far superior to the ordinary dredge.. The new clam-shell dredge will be capable of excavating 60 ft. back from the face of the dock into the scow or vice versa. It will excavate at either end of itself and dump into scow at the other end. This makes possible through cutting and cleaning narrow strips cheaply. It will excavate trenches of 150 ft. or more in depth. It will excavate material and throw it to one side 150 ft. from the orginal site where there is 4 ft. of water between dump and channel. It will excavate shallow channels down to 4 ft. by 44 ft. It wil! clean out bowlders or obstructions without disturbing the surrounding bottom. It will excavate close to docks without injury to the dock. It _ will do anything that an ordinary derrick will do up to ten tons at 75 ft. radius, and it. can therefore be seen that it makes an excellent wrecking tool. A HAND TESTING PUMP. The Dake Engine Co., Grand Haven, Mich., manufacture a hand testing pump which is shown in the accompanying il- lustration. This pump is for use on steamboats for the test- ing of boilers. It is simple, durable and efficient. The maker states that many orders are being received for it, and that the users express perfect satisfaction with it.