integraph

Beside the table stood a Munson-Bradley integraph calculator which one of the men was using to check some of the equations he had already derived.

Here they had two different types of integraph calculators and plenty of paper and equipment to do their own calculations and draw graphs.

While an integrator determines the value of a definite integral, hence a Integraphs. mere constant, an integraph gives the value of an indefinite integral, which is a function of x.

The object of the integraph is to draw this new curve when the tracer of the instrument is guided along the y-curve.

Boys' integraph was invented during a sleepless night, and during the following days carried out as a working model, which gives highly satisfactory results.