368 



Annals of Horticulture. 



Any blacksmith can reproduce it. The hook is pulled down 

 to the weight resting on top of the post, and slipped into its 

 ring. As the weight is hoisted, the hook-ring will be seen to 



remain at the left-hand 



end of 

 shown, 

 reached 

 which it 



the slot, as 

 When it has 

 the height at 



is desired to 



drop the weight, the long 

 tongue of the hook trips 

 against a rod or slat ex- 

 tended across the frame 

 for the purpose, and is 

 pulled down. This act 

 lets the weight slide to 

 the left, and the hook- 

 ring to the right in the 

 The weight is thus freed and falls 



Fig. 17. 



slot (see right of picture), 

 heavily on the post. 

 Thirteen-foot planks are 

 firmly braced on the front 

 ends of stone-boat planks, 

 held together by irons , 

 and bolts eight feet from |j 

 the ground so they will |j 

 not interfere with posts ffi 

 being driven. When be- 

 ing drawn from one field 

 or farm to another, the boat-planks are connected in front 

 and behind by hooks made of heavy wire. This prevents 

 their spreading. Two pulleys are made of double thicknesses 

 of inch board. The grain of these boards is placed at right 

 angles the one to the other, to prevent splitting. One is hung 

 at the top of the upright, to receive the rope direct from the 

 weight-hook, and the other at the rear end of the boat-planks 

 y^^^^^ on a brace. A 



_ /f ^~^ :=Z======:=::==:::: =====^ horse draws 



_ _rr ^=r——=~^^ J5Sf/ t ^ ie macn i ne 



— — — along astride 



Fig. 18. the fence-row, 



