It is much easier to draw than drawing a picture of the beaker. Cross-section diagrams are used in science to help make scientific diagrams of apparatus clear and easy to understand what they show.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

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Thomas P. How, of Randolph, ?. Y., has made an improvement in the wheel pen for dotting lines in mathematical drawing, which it is thought will much increase its value. These pens have heretofore ...

It is much easier to draw than drawing a picture of the beaker. Cross-section diagrams are used in science to help make scientific diagrams of apparatus clear and easy to understand what they show.