The chloroform soluble constituents of maple syrup.

The fact that the sap of the maple tree could be used for the production of maple syrup was discovered by the Indians, prior to the arrival of the white race. Towards the end of the seventeenth century the French settlers devised better methods for concentrating the sap, and thus created an industry which at present has a value of approximately $4,000,000.00 annually. The maple sugar industry is confined to Eastern Canada, and to a few states in North Eastern United States. [...