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 ...

It’s important for consumers and especially parents to learn all they can about the pure caffeine powder that has been linked to the recent death of an Ohio teenager. The Food and Drug Administration ...

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 ...

Substance misuse causes severe side effects, affecting a person's general wellness. It affects their mental and physical health. One of the significant side effects is changes in the appearance of the ...