128 



EG YP TIAN A GR 1 C f -L TUBE. 



The Norwegian Harrow is an implement for pulverizing 

 the soil, and is of different construction to any of the pre- 

 viously mentioned rollers, having three axles on which are 

 fixed spikes. When passed over the land the 

 spikes pierce the clods and disintegrate them. 



FiG. 26. NOKAVEGIAN HAUUONV. 



In Egypt the Zahaffa or baulk of timber is used with 

 some success for the purpose of attaining a fine tilth and 



FIG. 27. Tin: ZAHAFFA. 



making the surface more uniform. It takes the place, to 

 some extent, of a harrow and light roller. 



