A text-book of quantitative chemical analysis: by Alex. Charles Cumming and Sydney Alexander Kay. Seventh Edition, 496 pages, illustrations, 15 × 23 cms. New York, D. Van Nostrand Company, Inc., 1939. Price $5.00

Qualitative chemical analysis, certain p

Qualitative chemical analysis, certain principles and methods used in identifying inorganic substances together with a systematic survey of the chemistry of these materials: by Roy K. McAlpine, Ph.D. and Byron A. Soule, Sc.D., University of Michigan. Based upon the text by A. B. Prescott and O. C. Johnson, 696 pages, tables, 15.5 × 23.5 cms. New York, D. Van Nostrand Company, Inc., 1933. Price $4.50

✍ J.S. Hepburn 📂 Article 📅 1933 🏛 Elsevier Science 🌐 English ⚖ 65 KB

Marius used a telescope and did observe the inner satellites of Jupiter, though apparently he did not realize their true nature, for which discovery the Italian must be credited. It is hardly true, as we read on page 128, that the rings of Saturn can ever be seen "with prism binoculars," unless they