168 OPEN AIR GRAPE CULTURE. 



(from which the horizontal arms spring) may reach 

 its upper edge when laid, against it. If the trellis is 

 over seven and a half feet high, it will be well to nail 

 a third slat, equidistant between the two, though it 

 is not absolutely necessary. The next step is to 

 divide the spaces between the slats into equal parts 

 of about 15 inches each. Thus if the trellis be seven 

 and a half feet high, and two slats (the lower one ten 

 inches from the ground) we would divide into five 

 sj^aces of 16 inches each. If nine feet high with three 

 slats (the lower one twelve inches from the ground) 

 we would divide each of the two spaces into three 

 divisions of 16 inches each. Then take ]S"o. 12-16 

 annealed iron wire, twist a good loop on the end, and 

 having slipped it over a stout nail driven into the end 

 post, draw the wire along the posts, attaching it to 

 each with a small staple well driven in until the last 

 is reached, when the wire may be twisted round a 

 nail or pin and the loose end secured by a staple. 



Various devices have been proposed for drawing 

 the wire tight and adjusting it for contraction and 

 elongation according to the temperature, as is done in 

 the construction of fences. But we are satisfied that 

 there is no necessity for this, as the wire can be 

 drawn over a stretch of eight feet tight enough for all 

 practical purposes, while it will always be loose 

 enough to allow of any contraction that can take 



