Nominal line

RULERS-smooth planed planks-were used by the ancient Egyptians in the construction of their pyramids. The Russian scribes did not do without a ruler. In the expense books of Moscow orders of the XVIII century the name Karkasy is often found. It was a peculiar personality. It was a wooden frame the size of a leaf, on which threads were stretched taut. Placing the frame on a sheet of paper, the scribe ran a bone stick along the threads, squeezing out the lines.
HOW OLD IS THE LINE?
Many historians believe that rulers divided by centimeters and millimeters are more than two hundred years old. This opinion was held by scientists until an analog of the modern ruler was found during the excavations of Pompeii. Ancient rulers were carefully planed planks. They helped the ancient architects in creating drawings. In the middle ages German monks made markings of lines and columns on sheets using special lead plates. In many European countries, iron bars were used instead, called " awls».
The line, which is now widely used by us, appeared in France. Then the best academicians were given the task to develop a new improved type of ruler with a new system of measures.
First two lines were made by French academicians. They were made of platinum. Then the production of lines from wood began.
In 1812 these lines were sent to Russia as a war trophy. However, their production in our country was established only since 1899. The initiator of this move was Dmitry Ivanovich Mendeleev. It was this great chemist who helped to ensure that the metric system of measures was introduced in Russia, and with it the ruler.
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