Scientific American Volume 59 Number 23 (December 1888) . his is, for equalpower, naturallymuch less thanfor boilers, en-gines, and shafts. There is a sav-ing of more thantwo-thirds of thecost of fuel androom required forits storage. Such occur-rences as disabledshafts and screwsare impossible,and overpressurecannot occurunder any circum-stances. As thepower is notstored, either ashot water orsteam, this, ofcourse, dispenseswith getting upsteam or blow-ing off. The power isapplied in propul-sion in such away as to producethe greatest re-sistance from thewater with the least disturbance of its


Scientific American Volume 59 Number 23 (December 1888) . his is, for equalpower, naturallymuch less thanfor boilers, en-gines, and shafts. There is a sav-ing of more thantwo-thirds of thecost of fuel androom required forits storage. Such occur-rences as disabledshafts and screwsare impossible,and overpressurecannot occurunder any circum-stances. As thepower is notstored, either ashot water orsteam, this, ofcourse, dispenseswith getting upsteam or blow-ing off. The power isapplied in propul-sion in such away as to producethe greatest re-sistance from thewater with the least disturbance of its inertia, percontra the greatest reactive effect. In the largest vessel afloat, the captain from hisbridge can stop the propelling force more quickly thanan engineer can stop the engine of a launch, and inthose of moderate size it is possible to maintain highspeed for long distances. We may add this vessel is a modification of boat, the construction and mechanism of whichwere illustrated and described in the ScientificAmerican of July 24, :&.A. ? ^ Fig. WITH AUDIBLEBEATS. The Heating of Railroad Cars. If some inventive genius will turn his attention tothe contriving of a better apparatus for the heating ofrailroad cars by steam than is at present in use, he willstand a fair chance of making a fortune if he is success-ful. He will also save travelers from a great deal ofsuffering this winter and thus earn the gratitude ofthe traveling public. Owing to the new law forbidding the use of stoves incars, the railroad companies have been obliged to re-sort for heat to steam, which is supplied by the men admit that it will be almost impossibleto heat long trains of cars by these means in the cold-est weather, while any accident to the pipes, or anynecessity that would take the engine away from thetrain, would leave the cars unsupplied. The law prohibiting the use of stoves is a good one,but travelers on the railroad are already beginning


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