108 COMBINED PORTABLE ENGINE 



To haul the engine on the frame, a wooden inclined plane 

 is placed at the end; the drum worked by hand serves 

 to haul the engine into position. 



The work of one of these winding drums on the property 

 of L. Perriere, at Salauze (Aude) was followed by P. Castei, 

 engineer, who published an account in the Bulletin of the 

 Society centrale cf agriculture de VAude. From his account 

 we condense the following :- 



The drum was worked with a 7 H.P. engine, consuming 

 343*2 Ibs. of coal in ten hours, costing 21s. 2d. per ton ; in a 

 day of ten hours the engine required 220 gallons of water.* 



The drum was 19*7 inches in diameter, 35*4 inches in 

 width; the cable 0'63 inches in diameter, 274 yards in length. 

 The plough was hauled up a hill in compact soil, composed 

 of pebbles and clay ; the bottom of the block was sandy and 

 light. The furrow was 24 inches deep and 27 -J inches in width. 

 At the bottom of the block the depth was 27-J inches. The 

 average speed of the plough was 12 inches per second. f 



The furrow was 265 yards in length ; on the engine side 

 the headland was 20 feet in width ; on the opposite, 1 1 feet. 



At the end of each furrow two men lifted the plough, 

 ready to be hauled back, this operation taking one minute ; 

 a pair of bullocks took the plough back to the bottom of 

 the block, where one man was sufficient to put it into 

 position. Two men attended the engine and drum, dis- 

 placing it while the plough was being hauled back. 



The time required to open a furrow was : 



Work of the plough ... ... 11*5 minutes. 



Lifting the plough for hauling back 1 -0 

 Hauling back ... ... 2'5 



Placing in position ... ... 0'5 



Total 15-5 



According to this, 232 poles may be ploughed per day of 

 ten hours. 



At Salauze 34 furrows only were actually ploughed, equi- 

 valent to 208 poles. 



* These figures for 7 H.P. give per H.P. per hour 48 '4 Ibs. of coal, 3'74 

 gallons of water ; 2*2 Ibs. of coal therefore vaporizes about 1'76 gallons of 

 water 



t The weight of the system, which is 7,400 kilos (7 tons 5 cwt. ) (frame and 

 drum 3,000 kilos, portable engine 3,800 kilos, water in the boiler 600 

 kilos) is sufficient to prevent it from sliding under the action of the traction. 



