The Chemical engineer Volume 5 ; A monthly journal of practical, applied and analytical chemistry - Books Group, Paperback

• Release Date   5/20/2012
• ISBN-13   9781236268303 | 978-1-236-26830-3
• ISBN   123626830X | 1-236-26830-X
• Format   Paperback
• Author(s)   Books Group
• This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...with us. Perhaps the best of these for our conditions would he that of mixed injection, for the extra cost of installation and operation is not great and the personal element of the "stiller" is entirely eliminated. SPIRITS OF TURPENTINE. The chief constituent of spirits of turpentine is pinene, C0H10. Many battles have been waged over the structural formula of this compound. At first it was classified among the open chain hydrocarbons but later was shown to be a ring compound. Of the many formulas proposed that of Wagner is most in accord with the reactions of the substance. Some of the work upon American spirits of turpentine has been in vain, because investigators failed to take into account the facts that in our turpentine orchards more than one species of pine is turpentined and that the crude turpentine from each is indiscriminately mixed when collected. Recognizing these facts J. H. Long in 1893 secured specimens from identified individual trees, distilled the volatile oils from each and concluded that while American turpentine rotates the plane of polarized light to the right the variations in the amount of rotation in different specimens is due to admixture of the lsevo-rotatory oil from Cuban pine with the dextro-rotatory oil from the Longleaf pine, and as the latter tree generally predominates the resultant oils are more or less dextrorotatory. New light has been thrown upon this subject by an investigation carried on during the past year in the chemical laboratory of the University of North Carolina in collaboration with the U. S. Forest Service, by which the results of this study are to be published shortly. Through the courtesy of the Service I am enabled to refer to some of the results of special interest in this connection. During ...