The Portland Pudgy safety dinghy is a self-rescue boat, even without the optional inflatable exposure canopy and other survival gear. With the exposure canopy, sea anchor, and sail kit, the Portland Pudgy is an unsinkable, dynamic lifeboat.
The âlead pencil,â containing no lead, was invented in 1564, a turning point in pencil history. Although civilizations were centuries away from making mechanical pencil history, the pencil invented in the sixteenth century advanced the writing instrument. Before 1564, artists mainly used stylus-like pencils. The history of the pencil owes a dept to the discovery of a graphite mine in Cumbria, England.
Although rumors suggest that pencils used to be made from pure lead, this is a myth. Pencils have always been made of graphite since the mineral's discovery in 1565. The pencil hadn't taken on it's true form until 1660 when they were made as graphite rods encased with wood as we know them today. The only main difference is in the graphite mixture.