THE MECHANISM OF HEREDITY AS INDICATED BY THE INHERITANCE OF LINKED CHARACTERS
PROFESSOR T. H. MORGAN
IT is generally recognized to-day that the central idea of Mendel’s discovery in regard to heredity is that when two contrasting elements enter a hybrid, one from each parent, they separate in the germcells of the hybrid, so that the germ-cells are pure like those of the original parents in regard to each element.1
1. FREQUENCY, DISTRIBUTION, VARIETIES OF HUMAN CANCER
DR. LEO LOEB
IT is well known that all organisms, plants as well as animals, are composed of small units—the so-called cells—in which a nucleus is surrounded by protoplasm and certain special structures. Each part of the animal body is formed by aggregations of different kinds of cells.
PSYCHOLOGY has, of recent years, been exhorted to be practical, praised for its willingness to be practical, blamed for its unwillingness to be practical. “ A kind of psychology which is needed is that of every-day people.”
I HAVE been invited to write upon the Illinois system of permanent fertility; but I wish to state in the beginning that, in complying with this request, I am speaking in a representative capacity. Many have contributed to the development of this system, including both able investigators in other states and countries, my own colleagues in the investigation of Illinois soils, and the truly scientific farmers of this state, some of whom have kept their own farm practise so close up to the work of the experiment stations as to exert great influence upon the adoption of systems of permanent fertility.
WASHINGTON AND LEE UNIVERSITY NOT long since M. Louis Quennessen of Paris (head of the old house of Des Moutis & Co., platinum refiners) directed my attention to an early worker on platinum, Pierre-François Chabaneau, whose name has so far escaped the historians of chemistry that I think it is not even mentioned in any English or German work, and has only appeared in the last edition of Moissan’s “Traité de Chimie Minérale.”
THE problem is, to be free without being absurd. Confronted by a series of types, or a series of phenomena, one attempts to classify in an original and accurate manner. In the natural sciences, it is never possible to have the whole of the facts before us.
A COMPARISON OF WHITE AND COLORED CHILDREN MEASURED BY THE BINET SCALE OF INTELLIGENCE
WHEREVER the methods of science have been inapplicable, or for some reason been left unapplied, opinion has held sway, and, as the adage has it, the number of opinions has equalled that of the men holding them. This, it need hardly be pointed out, is seen clearly in the histories and literatures of religion, philosophy, ethics, politics and many branches of the newer social sciences.
SINCE the close of the civil war, the American people have devoted their energies largely to the development of their material resources. In 1865, the men who had served in the armies of the south as well as of the north returned to the pursuits of peace and, reinforced by the rising tide of immigration, the nation entered afresh upon the industrial conquest of its environment.
DEMOCRACY has been working for more than a century to understand its own genesis and genius; but not enough attention has been paid to the most central element in the development of the complete democracy of the future. We have talked too much about ideals, but not enough about methods of realizing our ideals.
AT the anniversary meeting of the Royal Society held on December 1, Sir William Crookes was elected to the presidency in succession to Sir Archibald Geikie. As a change in this office is made only once in five years, election to it is the highest honor for a British man of science, the immediate predecessors of Sir Archibald Geikie having been Sir William Huggins, Lord Lister, Lord Rayleigh and Lord Kelvin, a roll of scientific distinction which it would be difficult to parallel.