When Was the Pencil Invented?
When Was the Pencil Invented? Did you know that modern pencils owe it all to an ancient Roman writing instrument called a stylus? Scribes used this thin metal rod to...
Read MoreWhen Was the Pencil Invented? Did you know that modern pencils owe it all to an ancient Roman writing instrument called a stylus? Scribes used this thin metal rod to...
Read MoreWhat Is Cement Made From? Cement is made from a mixture of lime, clay, silica, iron and aluminum minerals. Limestone is the most important source for the calcium, while...
Read MoreThe ordinary bricks a bricklayer uses to construct a brick building are made from clay that is baked in an oven. The clay is mixed with sand and water. This “mud” is...
Read MoreThe common name “pencil lead” is due to an historic association with the stylus made of lead in ancient Roman times. The ancient Romans used a writing device called a...
Read More