Reports of Judges. 109 



No. 722. Locomotive Passenger Car., (Joseph Page Wood- 

 bury.) In this model the engine is placed directly on the forward 

 truck, so that the engine and boiler move with the truck, thus 

 doing away entirely with the flexible tubes which are used on ordi- 

 nary locomotive passenger cars, and allowyig of very great mobility 

 in the action of the car. The juiy had no means of making a prac- 

 tical test of this invention, since it is not in operation on the street 

 railroads of New York, but they have no doubt that it will turn 

 as short a corner as will be required in its adaptation to street rail- 

 roads. The weight of the passengers will give sufficient amount of 

 adhesion to allow it to run at any speed allowable within the 

 corporation limits. The inventor claims freedorn from noise, but 

 the jury cannot judge of this from a model. The use of anthi-a- 

 cite coal will give entire freedom from smoke. 



No. 203. Jack Screws, four sizes. (Bridges & Lane.) Li these 

 screws the movement of a single nut operates two screws, so that all 

 the advantages of the velocity of a double thread are gained, while 

 the weight of which the screw is capable is twice what it would be 

 if a double thread were used on a single column. The point which 

 comes in contact with the material to be lifted is fixed to the screw 

 so that the friction, instead of being applied to the cap, which is 

 never well lubricated, is divided over the threads of the screw; 

 which always are well oiled. The lever power is applied to the 

 circumference of the nut. so that the useful effect of the whole 

 lever is obtained, instead of a fractional part of it, as in the ordinary 

 system. 



No. 182. System of Bridge Building. (T. W. H. Moseley.) The 

 model bore the severest test that the iury could apply to it, and 

 finally broke from a defect in the construction of the model. The 

 plan of the bridge, as explained by the exhibitors, is highl}- com- 

 mendable. 



No. 212. (Joseph Dixon.) Is an application of cast iron to 

 building purposes, in which plates of cast iron are made to answer 

 the purpose of stone. These plates are bound together by bolts 

 and by joints of several kinds, as is shown on the model exhibited. 

 The particular purpose for which the inventor proposes to adapt 

 his invention, is for tumiels. This invention would greatly facili- 

 tate the construction of tunnels which pass through ground which 

 \nll not stand. Some members of the jury are of the opmion that 

 cast iron has been used for this purpose before, but as they are not 



