CONSIDERABLE progress has been made of late years in our knowledge concerning the structure and relations of atoms and electricity. Recent discoveries have moreover placed in a new light old theories and experimental work. The remarkable investigations and deductions made from his own experiments and those of others, which have led Professor J. J. Thomson to the conclusion that atoms can be split up into, or can give off, smaller masses, which he calls corpuscles, were explained by him in a most interesting article in the POPULAR SCIENCE MONTHLY for August, 1901.
SULFURIC ACID AND ITS MANUFACTURE BY THE CONTACT-PROCESS.*
Purification of the Gases.
DR. R. KNEITSCH
THAT the subject on which you ask me to speak is of the greatest interest from an industrial standpoint needs no argument. The sulfuric acid industry is rightly looked upon as the foundation of inorganic technology, but it has also in the last few years, aside from its importance in so many departments of the various textile branches, become of equal necessity in the manufacture of the organic dye-stuffs.
HE is a chip of the old block' is the popular expression used in applying the best known general law of heredity that 'like begets like' to a particular case. But in saying so we state but half the truth. The chip is like the block and not like the block.
THE philological legend that the vocabulary of a workingman is only about 300 words* should show proof why it should not go the way of all legends when it is found that a child of two and a half or even two years uses by actual count from 600 to 800 different words in one day.
MESCAL (Anhalonium Lewinii) belongs to the group of plants which in various parts of the world have been intimately connected with religion and have received the honors due to divine beings. This group may indeed be said to be large, but mescal—on account of the special appeal to the supernatural which its peculiar properties make—belongs to the innermost circle of such plants.
INFECTIOUS diseases have devastated more homes than all wars combined, and a check to their ravages would be the greatest boon suffering mankind can hope to achieve. These diseases are supposed to owe their origin to the activity of ferments, enzymes, sporozoa or other ultra-microscopical organisms, consequently they must have some reactions in common with other phenomena depending upon the same agencies.
THE PHYSIOLOGICAL EFFECTS OF ELECTRICALLY CHARGED MOLECULES.*
PROFESSOR JACQUES LOEB
FIVE years ago I published a series of papers on the physiological effects of the electric current which impressed upon me the long-known fact that the galvanic current is the most universal and effective stimulus for life phenomena. This fact suggested to me the idea that it should be possible to influence life phenomena just as universally and effectively by the electrically charged molecules—the ions—as we can influence them by the electric current.
AN AFTERNOON AT CHELLES AND THE EARLIEST EVIDENCES OF HUMAN INDUSTRY IN FRANCE.
PROFESSOR A. S. PACKARD
THE earliest traces of human occupation in France and on the European continent occur at Chelles, near Paris. We have said the oldest on the continent, for apparently still older flint implements occur in England. We refer to the so-called 'Eoliths,' or plateau implements, found by Harrison, Prestwich and others in southern England.
THE AMERICAN PHILOSOPHICAL SOCIETY AND THE AMERICAN PHILOSOPHICAL ASSOCIATION.
SOCIETIES FOR THE SCIENTIFIC STUDY OF EDUCATION.
BIOGRAPHIES OF EMINENT CHEMISTS.
THE CONDITIONS OF CHEMICAL ACTION.
THE PERIODICITY OF SOLAR PHENOMENA.
THE bequest of Cecil Rhodes for education and the promotion of a good understanding between Great Britain and the United States follows very closely upon Mr. Carnegie's endowments of education in Scotland and of research in the United States.