"This is not a moment when we should pretend to review the work which M. Wöhler has done in mineral chemistry. Among the 240 papers which he has published in scientific journals, there are few which the treatises of chemistry have not immediately turned to account. We need only confine ourselves to the discovery of aluminum, to which the energy and inventive genius of our _confrère_, Henry Deville, soon gave a place near the noble metals. United by a rivalry which would have divided less noble minds, these two great chemists carried on together their researches in chemistry, and joined their forces to clear up points still obscure in the history of boron, silicium, and the metals of the platinum group, and remained closely united, which each year only strengthened. "The reader will pardon me a souvenir entirely personal. We were born, M. Wöhler and I, in 1800. I am his senior by a few days. Our scientific life began at the same date, and during sixty years everything has combined to bind more closely the links of brotherhood which has existed for so long a time." * * * * * OUR HEBREW POPULATION. The United Jewish Association has made a canvass of the denomination in this country, finding 278 congregations, and a total Jewish population of 230,984. New York has the largest number--80,565. Then follows Pennsylvania, with 20,000; California, with 18,580; Ohio with 14,581; Illinois, with 12,625, and Maryland, with 10,357. The Jewish population in the largest cities is as follows: New York 60,000 San Francisco 16,000 Brooklyn 14,000 Philadelphia 13,000 Chicago 12,000 Baltimore 10,000 Cincinnati 8,000 Boston 7,000 St. Louis 6,500 New Orleans 5,000 Cleveland 3,500 Newark 3,500 Milwaukee 3,500 Louisville 2,500 Pittsburg 2,000 Detroit 2,000 Washington 1,500 New Haven 1,000 Rochester 1,000 This total Jewish population of 230,984 has six hospitals, eleven orphan asylums and homes, fourteen free colleges and schools, and 602 benevolent lodges. Of the free schools maintained by the Hebrews, five are in New York, four in Philadelphia, and one each in Cincinnati, St. Louis, Chicago, and San Francisco. Their hospitals are in New York, Philadelphia, Baltimore, Cincinnati, New Orleans, and Chicago, while their orphan asylums, homes, and other benevolent institutions are scattered all over the country. * * * * * THE MYSTERIES OF THE BAIKAL.