Measuring the card with a planimeter shows the mean effective pressure to be 48.2 pounds.
The construction of a second funicular may be dispensed with by the employment of a planimeter, as follows.
At least two such readings were taken for each home range; then these planimeter values were converted into square feet.
By aid of a planimeter determine the areas P, P1, P2, of these three curves.
If he has no planimeter, a delicate balance will serve just as well.
From this it follows that the error of the planimeter is less than 0.1 per cent.
The planimeter is an instrument for measuring areas in general, and especially for measuring the areas of indicator cards.
If the error of its reading be not sensibly greater than that of a planimeter, it is certainly worth double the money.
Areas were measured with a planimeter; distances traveled by individuals were measured with a cartometer.
The simple finding of areas we may omit, as the planimeter will do that equally well.