Turpentine. Common turpentine is the natural resinous juice which exists in trees of the fir tribe. It is obtained in large quantities from the wild pine, or Scotch fir. but, it is brought to us chiefly from the northern countries of Europe. To procure the turpentine, the trees are stripped of their outer bark in the month of May, to the extent of about six inches, so as to expose the inner smooth bark, near the foot of the tree, where an incision is made.