140 BOARD OF AGRICULTURE. 



wind causes them to always wind alike, saving time in taking up slack in guiding, 

 and holding it steadily in its course. The engine is compact and convenieat, and 

 is claimed to work with the greatest economy, and to devolpe unusual power in the 

 field or on the road, being ample to go with its- train through plowed fields or 

 rough roads wherever desired. It is also claimed that it will go down any ordinary 

 hill with safety to the crown sheet if water is carried flush. For reversing, the 

 regular locomotive link motion is used. 



Traction Engine, by Robinson & Co., Richmond, Ind. This firm exhibits their 

 traction engine, which has many points of merit. Among these may be noticed 

 that it is very readily put out of gear, so as to be moved as a portable by horses 

 when necessary. The boiler is supported on springs over the rear axle, which 

 break the force of shocks that are so destructive to heavy machines passing 

 over rongh places. The regular locomotive link is used for reversing, and the two 

 eccentrics are cast together, so that Avhen one is right the other must be. The arm 

 of the rock-shaft is one and a half inches above the center of the shaft when the 

 valve is on half stroke, by which arrangement it is claimed there is much less 

 wear of parts, as the engine is alway.'i run in one direction in doing regular work. 

 The general arrangement makes it very convenient to handle, and the material and 

 workmanship are superior. 



Model of Jjocomotive Engine, by D. A. Reynold/^, Wavcland, Ind. This is a model 

 made of wood by the exhibiter, who is a young farmer, and not a trained me- 

 chanic, which ia a very fair representation of a locomotive engine and tender- 

 The work was done with a very limited supply of tools, and gives evidence of good 

 natural abilities as a mechanic, and shows the direction or bent of his mind. The 

 worlc is highly creditable to him. 



O. A. Zschech & Co., and Vinton Iron Work.'<, Indianapolii^. Exhibit three saw 

 mills, which they designate as their C, D and E mills respectively. The C aud D 

 mills differ only in size and capacity. Their frames, or husks, are made of either 

 wood or iron, as desired. The mandrels are of steel, with their collars forged on 

 them, which are recessed into their boxes to exclude dust and save oil. The boxes 

 are pivoted, and allign themselves without unnecessary friction. The mandrel ex- 

 tends outside the main frame far enough to carry the driving pully, and take a 

 bearing in a rigid frame that supports the out end of it, so that the tension of the 

 belt adds no friction to the journal at the saw. This long mandrel also gives more 

 room to the off-bearer. The upper saw mandrel has bearings close on either side of 

 its pulley, and an automatic tightener gives any desired tension to its belt, and in- 

 stantly takes up any slack made by a hard pull. The friction pulley, for feeding 

 or backing, accommodates itself to the face of the pulley it is working against. A 

 patented guide enables the sawyer to adjust the lead of the saw with entire safety. 

 These mills are furnished with the Zschech head-blocks which set accurately by 

 sixteenths up to 2^ inches. No panels are used in these head-blocks to wear and 

 make them set uneven, and they are conveniently thrown out of gear for backing 

 knees or sawing tapers. 



