The Peoples Chemistry

This is mercury(I) oxide (HgjO). Heat will disproportionate it to Hg and HgO. 

The liquefaction of permanent gases will be described in the essay on the discovery of neon. 

Ozone reacts with alkenes (olefins) through addition to the double bond. The initially formed ozonides decompose further. Schbnbein appears to have performed the first such identified ozonolysis (on ethylene). Turpentine is a complex mixture of olefinic terpenes (see P.S. Bailey, Ozonation in Organic Chemistry, Academic Press, New York, 1978, pp. 1—4, for a brief historical perspective). 

Pauling, The Nature of the Chemical Bond, Cornell University Press, Ithaca, 1939. 

Flemming, P.T Wolczanski, and R. Hoffmann, Journal of the American Chemical Society, Vol. 127 1278, 2005. This article describes potential ways to stabilize in transition metal com-plexes. The author thanks Professor Roald Hoffmann for bringing this problem to his attention. 

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