PROF. TIMMERMANS has chosen as a basis for his monograph on “Chemical Species” the definitions given by Wald in 1897, and used by Ostwald in 1904 in the Faraday Lecture in which he tried to show that ...

ABOUT ten years ago, Messrs. Adam Hilger, Ltd., the well-known firm of optical instrument makers, first undertook to place on the market substances of a high degree of purity such as could be relied ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

The Journal of Infectious Diseases, Vol. 43, No. 5 (Nov., 1928), pp. 363-377 (15 pages) This paper contains a report on the production of histamine, tyramine, bronchospastic, and arteriospastic ...