This section is from the book "The Home Cyclopedia Of Health And Medicine", by Henry Hartshorne. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
A preparation of the active principle of the leaves of the South American erythroxylon coca. It has been found, when applied (a few drops of a four per cent, solution in water) to the eyeball, throat, etc., to render the part in-sensible to pain; so as to greatly facilitate some surgical operations.
 
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