sentences:  While at Boston, Kinnersley continued his experiments and discovered the difference between the electricity that was produced by the glass and sulphur globes, which he at once communicated to Franklin at Philadelphia.Until then the theory of Du Fay as to the vitreous and resinous electricity was generally adopted, but now Kinnersley showed beyond a doubt that the positive and negative theory was correct.From Boston, Kinnersley went to Newport, Rhode Island, and, in March 1752, repeated his lectures there and suggested how houses and barns might be protected from lightning.