PERHAPS no statement in regard to the source of our commercial rubbers is more surprising to one unacquainted with this particular field than that over 200 species of plants contribute to the sum total of the crude material which comes to the market.
ROUSSEAU’S CONTRIBUTIONS TO PSYCHOLOGY, PHILOSOPHY AND EDUCATION
PROFESSOR W. B. PILLSBURY
AS is often the case with a great man viewed two centuries after his time, one is tempted to wonder what the source of Rousseau’s repute may have been. Few men have so greatly influenced the course of thought in many different directions as Rousseau and few great men have been as little worthy of influence, judged by their characters or their attainments.
WITHIN recent years several investigations have been made concerning the effect of smoking on college students, but in the opinion of the present writer the bases upon which conclusions were founded were often of such a nature that the results were more or less indefinite and unreliable.
A FEW months ago, Woodrow Wilson, governor of New Jersey, stood in the little bedroom of the Presbyterian manse at Caldwell. The reason for his pilgrimage to that village and to that particular house was the fact that there Grover Cleveland, the twenty-second and twenty-fourth president of the United States, was born, March 18, 1837.
HISTORY is a science; it belongs to the family of social sciences. History is concerned with more than the mere perfunctory cataloging of incidents, with more than a string of events held together by the colorless thread of chronology. It is no longer to be considered a record of sanguinary episodes and of individual prowess or debauchery.
IT is unusual nowadays to write hopefully of our own times; it is so easy to point out the shortcomings of the industrial age, and so difficult clearly to see beyond the rapid changes of our times and properly to measure the huge forces now at work in society.
Showing the Number of Visible Oocytes in the Ovary of Certain Fowls
DR. RAYMOND PEARL
THOROUGH and searching investigation of two great biological problems is a necessary prerequisite to any substantial advance of the science of eugenics. These problems are: 1. The mode of inheritance of human characters and traits of all kinds.
THE MECHANISM OF THE INHERITANCE OF FECUNDITY AS MEASURED BY WINTER EGG PRODUCTION
Showing Some Results of Mating Together Barred Plymouth Rock Males and Barred Plymouth Rock Females of Different Fecundity Genotypes. Summarized Data
Showing the Observed and Expected Distribution in Respect of Fecundity of the Adult Female Offspring from all Matings in each of the Classes Tested in the Experiments
A study of numerous statistics shows that hens fall into three well defined classes in respect to winter production. These classes include (a) those birds which lay no eggs whatever in the winter period (up to March of the laying year); (b) those that lay but have a production during the period of something under about 30 eggs; and finally (c) those whose production exceeds 30 eggs in the winter period.
LAST year the distinguished president of this section raised us to the contemplation of the workings of the soul. I ask you to accompany me in the consideration of nothing higher than a stuffy room. Every one thinks that he suffers in an ill-ventilated room owing to some change in the chemical quality of the air, be it want of oxygen, or excess of carbon dioxide, the addition of some exhaled organic poison, or the destruction of some subtle property by passage of the air over steam-coils, or other heating or conducting apparatus.
WHEN I had the honor of being asked to deliver one of the general lectures, I had no choice but to accept and yet it was at once evident to me that I should experience very great difficulty in finding a subject suitable to this occasion and interesting to the brilliant and distinguished audience which I see before me this afternoon.
INTERNATIONAL SCIENTIFIC CONGRESSES MEETING IN AMERICA
THE ADDRESS OF THE PRESIDENT OF THE BRITISH ASSOCIATION
THE new Allegheny Observatory in Riverview Park, Pittsburgh, was dedicated on the afternoon of August 28, in the presence of the members of the Astronomical and Astrophysical Society of America and of many of the Pittsburgh friends of the institution.