Electricians in the Old World have come to the conclusion that the greatest protection a building can have is to have a few tall trees planted near it. The branches of a tree are as so many points conducting the electricity by the trunk to the ground; and hence the closer the branches grow to the trunk the better. What are called upright or fas-tigiate trees are therefore better for this purpose than trees with broad spreading heads. If there is a small pond of water between the tree and the building the protection is as perfect as it can be.