## Graphical Methods |

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angle approximation axis of abscissas axis of ordinates axis of x azimuth broken line calculation CARL RUNGE circular arc coincide Columbia University complex number const curve representing denote differential coefficient differential equation distance draw a parallel draw the line drawn ellipse equal equidistant values given values graphical methods horizontal line hour angle integral curve integral function intersects the axis Let us consider line coordinates measured modulus negative values opposite parabola pass perpendicular plotted point of intersection positive axis positive direction ratio rectangular coordinates satisfy the equation satisfying the differential scale division scale of depiction side slide rule stepping line straight line Suppose tangent Taylor's theorem tion triangle true curve unit of length unknown quantities uv plane value of df/dy values of f(x vanish vertical through q w-scale xy plane

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Page 150 - Price, $1.50 net. THE PRINCIPLES OF POLITICS FROM THE VIEWPOINT OF THE AMERICAN CITIZEN. By JEREMIAH W. JENKS, LL.D., Professor of Government and Public Administration in New York University.

Page 35 - F sin pt, and let us multiply the second equation by i and add it to the first. We then have The movement of the point Z representing the complex number z then serves as well to show the movement corresponding to x. We need only consider the projection of Z on the axis of x. A solution of the differential equation may be obtained by writing z = z0ep".

Page 150 - BLUMENTHAL LECTURES POLITICAL PROBLEMS OF AMERICAN DEVELOPMENT. By ALBERT SHAW, LL.D., Editor of the Review of Reviews.

Page 76 - Now we have shown above that a positive value of the functional determinant <pu\f/v — <pv^u means that Z2 is on the positive side of Zi, so that in this case Z moves in the positive sense (that is, in the direction from the positive axis of x to the positive axis of y) with increasing values of a. With a negative value Z moves in the opposite direction. Let us now suppose that the curves x = const. and y — const. in the uv plane intersect except on a certain curve where their direcu FIG.

Page 150 - Price, §1.50 net. WORLD ORGANIZATION AS AFFECTED BY THE NATURE OF THE MODERN STATE. By HON. DAVID JAYNE HILL, sometime American Ambassador to Germany.

Page 115 - We begin the integral curve over the upper part at the vertical x = a at a point E, the ordinate of which is arbitrary, and draw the broken line as far as F on the vertical x = b (Fig. 82). Then we integrate back again over the lower part, continuing the broken line from F to G. The line EG measured in the unit of length set down for the ordinates is equal to the area measured in units of area, this unit being a rectangle formed by PO and the unit of ordinates. That is to say, the area is equal to...

Page 150 - THE NATURE AND SOURCES OF THE LAW. By JOHN CHIPMAN GRAY, LL.D., Royall Professor of Law in Harvard University.

Page 51 - On the back side of the movable part of an ordinary slide rule there generally is a scale y = 2 + log sin t. When this part is turned round and the scale is brought into contact with the scale y = log x, we obtain for any position of the instrument log x — log sin t — log x...

Page 65 - When the functions <p(u, v) and ^(M, v) are defined for the values u, v of a certain region, they will furnish for every point u, v of this region a point in the xy plane. Let us call this a depiction of the uv plane on the xy plane. Similarly a function of one variable x = <p(u) might be said to depict the u line on the x line.

Page 98 - ... the pencil coincides with the scale division 5. As long as the celestial body does not materially alter its declination the diagram in this position will enable us to find any of the three values <p, h, a from the other two. As a second example let us consider the relation between the declination...