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phytofulgurite – a proposed class of objects resulting from partial to total alteration of biomass (e.g. grasses, lichens, moss, wood) by lightning, [18] [19] described as "natural glasses formed by cloud-to-ground lightning." These were excluded from the classification scheme because they are not glasses, so classifying them as a subset of ...
Lichtenberg figures can also be produced on wood. The types of wood and grain patterns affect the shape of the Lichtenberg figure produced. [16] By applying a coat of electrolytic solution to the surface of the wood, the resistance of the surface drops considerably. Two electrodes are then placed on the wood and a high voltage is passed across ...
Lightning strikes to the Gay Head Light are physically documented by the cracked cast iron lightning rod ball displayed on the grounds of today's Martha's Vineyard Museum. The changes to the Gay Head Light; its buildings and grounds, and the presence of the lightning rod are clearly illustrated in the 1839 woodcut print shown lower right.
The glass globes, known as "electerizing globes", [29] were made of glass that was scientifically designed to produce static electricity effectively. [30] Franklin specified the materials to be used in the glass formula, and the globes were manufactured by Caspar Wistar , a close associate of Franklin. [ 13 ]
A very important advance in glass manufacture was the technique of adding lead oxide to the molten glass; this improved the appearance of the glass and made it easier to melt using sea-coal as a furnace fuel. This technique also increased the "working period" of the glass, making it easier to manipulate.
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Nehushtan, a staff of bronze made by Moses to erect so that the Israelites who saw it would be protected from dying from the bites of the "fiery serpents". (Jewish mythology) Rod of Asclepius, a serpent-entwined rod wielded by Asclepius, a deity associated with healing and medicine. (Greek mythology)
Sir Rod Stewart and Ronnie Wood, who conquered the US in the late 60s with Jeff Beck and The Jeff Beck Group, have led tributes to the rock veteran following his death at the age of 78.