Show I on I 1 r professor as among the essentials to be in attaching lightning conductors to houses that them should bo no joint mile it lie a veil one chain link boils roils rop tub iii etc anre to be avoided alio ground must bo sound ami andi if there bo anoro than one ild have 1 separate but ai also to bo connected together also with the lead coolins and all iniss cs of metal in neighborhood it is lio says not necessary to insalato ins ulato conductors and there should bo no ta or in the conductor condu clor ahe and anoro direct its courso to tho cantli tho better v nc one fourth of nn inch in ii to be superior for this purpose and is largely employed in itis dilso believed to be a safo estimate lint tho area protected by a conductor is equal to ita height above the ground |