Notes on the Chemical Lectures for Second-Year Students in the Medical Department of the University of Pennsylvania (Classic Reprint)

Excerpt from Notes on the Chemical Lectures for Second-Year Students in the Medical Department of the University of Pennsylvania

CN, cyanogen is an organic compound composed of two elements.

Other organic compounds may be composed of three elements, - namely, carbon, hydrogen, and oxygen.

There are three principal groups of carbohydrads:

The Glucose group.
Saccharose group.
Amylose Group.

Organic compounds may be composed of four elements, carbon, hydrogen, oxygen, and nitrogen.

Some compounds are composed of only carbon and nitrogen, as CN, cyanogen, and others of carbon, nitrogen, and hydrogen, as HCN, hydrocyanic acid.

All organic compounds occurring in nature may be considered as falling under the above classification. By chemical means nearly all of the elements may be introduced into organic chemical compounds.

The number of possible combinations of these elements to produce new organic compounds is almost infinite. Ordinarily, however, only fourteen or fifteen elements are concerned in chemical combinations in organic chemistry.

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