made of tort elastic Wire. 27 t 



new principle, at all deserving a place in the Philosophical 

 Magazine, you will oblige me by giving it that distinc- 

 tion. 



The basis of the invisible fence is elastic iron wire, ma- 

 nufactured and applied on principles discovered by Mr. 

 James Pilton, King's Road, Chelsea, Middlesex. 



This infrangible material for the main wires is drawn out 

 to the thickness of a common quill, of which continuous 

 strings are inserted horizontally through upright iron stan- 

 chions : the interval between the strings is about nine 

 inches ; between the stanchions, about seven feet. The ho- 

 rizontal wires, in a state of tension, are fastened to two main 

 stanchions at the extremity of the fence, passing at freedom 

 through holes drilled in the intermediate stanchions. The 

 tension of every horizontal wire is preserved by the superior 

 stability of the extreme stanchions ; on the construction of 

 which, and the mechanism of the base work, the resistance of 

 the whole, as a barrier against heavy cattle, depends. When 

 the extent of the fence is great, the main stanchions are re- 

 lieved at expedient distances by other principal stanchions: 

 an improved mode of joining horizontal wires qualifies every 

 part of the length to bear the highest degree of tension. 



The invisible fence, in this simple form, of the height of 

 three feet six inches, has, in the Royal Pleasure Grounds at 

 .Frogmore, and in various parks of the nobility and gentry, 

 been found adequate to exclude the largest and strongest 

 kinds of grazing stock. Increased in height two feet, the 

 fence becomes applicable to deer parks. Deer have never 

 been known to injure it, or attempt to leap it; from its 

 transparent appearance they probably regard it as a snare. 



When it is intended further to keep lambs out of planta- 

 tions, perpendicular wires, comparatively slight, are inter- 

 woven upon the lower horizontal wires ; and to protect 

 flowers and exotics from hares and rabbits, it is only neces- 

 sary to narrow the interstices by minute additions to the 

 upright wires. 



On substances so small, presenting a round surface, nei- 

 ther rain nor snow can lodge; independent of which, bv a 



coating 



