130 ESSAYS AND OBSERVATIONS 



feet above the chimney or building thaC 

 the rod is fixed to. Drive into the ground 

 an iron rod of about an inch diameter, 

 and ten or twelve feet long, that has alfo 

 an eye oi* ring in its upper end. It is 

 beft that the rod fhould be at fome di- 

 ilance from the foundation of the build- 

 ing, not nearer than ten feet, if your 

 ground will allow fo much. Then take 

 as much length of iron rod of about half 

 an inch diameter, as will reach from the 

 eye in the rod above, to that in the rod be- 

 low ; and faften itfecurely to thofe rods, 

 by pafTmg its ends through the rings, and 

 bending thofe ends till they likewife form 

 rings. This length of rod may either be 

 in one or feveral pieces. If in feveral, 

 let the ends of the pieces be alfo well 

 hooked to each other. Then clofe and 

 cover every joint with lead, which is ea- 

 fily done, by making a fmall bag of ftrong 

 paper round the joint, tying it clofs be- 

 low, and then pouring in the melted lead; 

 it being of ufe in thefe juncflures, that there 

 fhould be a confiderable quantity of me- 

 talline contact between piece and piece. 



For, 



