above. For example, does each carbon atom of the ring in phenol lack one electron of filling its eight "possible electron positions" or do three of the carbon atoms lack two electrons each while the remaining three carbon atoms have all their "possible electron positions" filled, or is there some other combination? In conclusion, the main purpose of presenting this detailed scale model of the b...

This paper describes a pilot study of chloride, nitrate, and sulphate content in thoracic and high-risk respirable fractions of airborne particles. Samples were collected at one measuring site in Zagreb in autumn 1998 and spring 1999. The results showed that almost total chloride, nitrate, and sulphate content was present in the respirable particle fraction. The average mass contribution of the...

The concentration of six chemical species Pb, Cd, As, nitrates, fluorides and sulphates in the groundwater (borehole) samples were investigated four boreholes sited close to a dumpsite Rumuolumeni, Port Harcourt, Rivers State, Nigeria. Nitrates, analyzed using standard conventional methods while heavy metals determined with Atomic Absorption Spectrophotometer. mean values obtained for different...

Practical Uranalysis and Urinary Diagnosis. By Charles W. Purdy, M.D. Pp. xiv., 357. Philadelphia: The F. A. Davis Co. London: F. J. Rebman. 1894. Dr. Purdy's book is deserving of high praise. He describes a method devised by himself of rapidly determining the amounts after precipitation of the phosphates, chlorides, and sulphates present by means of the centrifugal machine. In testing for albu...