This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt:...earth. r' = radius of moon, or other body. P = moon's horizontal parallax = earth's angular semidiameter as seen from the moon. f = moon's angular semidiameter. Now = P (in circular measure), r'-r = r (in circular measure);.'. r: r':: P: P', or (radius of earth): (radios of (...) moon):: (moon's parallax): (moon's semidiameter). Examples. 1. Taking the moon's horizontal parallax as 57', and its angular diameter as 32', find its radius in miles, assuming the earth's radius to be 4000 miles. Here moon's semidiameter = 16';.-. 4000::: 57': 16';.-. r = 400 16 = 1123 miles. 2. The sun's horizontal parallax being 8"8, and his angular diameter 32V find his diameter in miles. ' Am. 872,727 miles. 3. The synodic period of Venus being 584 days, find the angle gained in each minute of time on the earth round the sun as centre. Am. l"-54 per minute. 4. Find the angular velocity with which Venus crosses the sun's disc, assuming the distances of Venus and the earth from the sun are as 7 to 10, as given by Bode's Law. Since (fig. 50) S V: VA:: 7: 3. But Srhas a relative angular velocity round the sun of l"-54 per minute (see Example 3); therefore, the relative angular velocity of A V round A is greater than this in the ratio of 7: 3, which gives an approximate result of 3"-6 per minute, the true rate being about 4" per minute. Annual ParaUax. 95. We have already seen that no displacement of the observer due to a change of position on the earth's surface could apparently affect the direction of a fixed star. However, as the earth in its annual motion describes an orbit of about 92 million miles radius round the sun, the different positions in space from which an observer views the fixed stars from time to time throughout the year must be separated... (shrink)

Originally published in 1926, a complement to the author's Outline of Psychology, this book surveys the field of neurotic and mental disorders in so far as they are not due to gross organic lesions. A book, not for the medical expert only, but for every man or woman interested in the riddle of human personality.

First published in 1932, the original blurb states: "This is a simplified condensation of the author’s two volumes, _An Outline of Psychology_ and _An Outline of Abnormal Psychology_, which together give a comprehensive survey of the principles and findings of modern psychology. This is designed as an introduction to the scientific study of man and society for those who have not time or inclination to pursue the more recondite problems of mind. It is suitable for college use in the introductory (...) course. It concentrates on the dynamics of the human organism and aims to give the student that minimum acquaintance with psychology without which he is not fitted to be a citizen of the modern world." Today it can be read and enjoyed in its historical context. (shrink)

Originally published in 1929, McDougall examines the pertinent conflict between religion and science. His work exhibits the failure of scientists to explain human action mechanistically, establishes purposive action as a type of event radically different from all mechanistic events, and justifies the belief in teleological causation without which there can be neither religion nor morals. This title will be of interest to students of both the Humanities and Sciences, particularly those studying psychology and philosophy.

The words “idea” and “concept” have been, and still are, the source of so much confusion in psychology that we shall do well to banish them from the vocabulary of that science. I have urged this reform and have endeavoured to promote it by writing a psychology without ideas.It has seemed to me that the word “concept” plays a no less pernicious rôle in logic. But it was not until I began to look into the matter with a view to (...) writing this article that I became aware of the desperate degree and extent of the confusion obtaining in all that pertains to the concepts of logic. (shrink)