133^ 



AGRICUI^TURAL MACHINERY AND IMPI.EMICNTS 



work. At the same time this process is advantageous from the economic 

 point of view (provided the stumps are thoroughly dry) as it yields products 

 the value of which may entirely cover the costs of extirpation. Thus, an 

 ordinary pine stump gave, in addition to excellent quality charcoal, about 

 15 gallons of heav}^ oils. 



Batterj- of Tree-stump burners in operation. 



1008 — Review of Patents. 



Tillage. 



Germany 286 313. Subsoil plough. 



286314. Grippcr wheel for molor ploughs. 

 286 315. Horse hoe. 



286 316. Return mechanism for cable-hauled ploughs. 

 286317- — 287810. Arrangement for ploughing, with i portable engine, 

 driving by cable 2 ploughs with return mechanism, be- 

 tween which it is set up. 



286 318. Motor plough with rear supporting wheel nmning on the mi- 



ploughed land. 



287 o8r. Furrow or ditch digger, especially for plantation. 



287 082. Motor plough with driving gear for the steering wheels. 

 287 100. Regulating and clearing mechanism for plough wheels. 

 287 130. Rotary screw digger. 



287 445. Ploughing machine with adjustalJe frame carrying plough shares 

 and coulters. 



287 484. Drill with several rows of teeth. 



2S7 573- Field harrow capable of use as a grassland leveller. 

 287811. Method of fixing plough bodies. 



288015. Rigid frame hoe carrying the working parts and jointed to the 

 shaft support. 



288 569. Arrangement to prevent side displacements of Ww l)iani in wheel 



ploughs. 

 288 (S.)5. A sprung jilough body. 



