APPENDIX. 



PRACTICAL TESTS ON WOOD TURPENTINES. 



Samples of each of the five wood turpentines, the refining of which is dis- 

 cussed in this bulletin, were submitted for practical testing to the Paint Manu- 

 facturers' Association and to several manufacturers of paints and varnishes. 

 In these tests the sample turpentines were given the same numbers as the 

 crudes from which they were distilled. The sample numbers and the numbers 

 of the corresponding text figures, which show the composition of the turpentines 

 at the time they were sent out for test, are as follows : 



The reports of the tests are given in full, as submitted by the various coop- 

 erators. There is no detailed analysis of the reports for the purpose of drawing 

 conclusions in regard to the use of these turpentines in the paint and varnish 

 industries. These can best be drawn by those thoroughly familiar with the 

 requirements of these industries. However, the following significant facts are 

 apparent : 



(1) The lack of concordance between the reports shows the futility of at- 

 tempting to establish a general relation between the composition and the 

 industrial value of turpentines, without standard methods for determining the 

 industrial value. The various individual reports probably indicate very accu- 

 rately the relative industrial values of the different turpentines so far as the 

 particular company making the report is concerned, but no general relation is 

 established. 



(2) Aside from the odor, the wood turpentines do not seem to vary much 

 from each other or from gum turpentine; at least, the differences between the 

 several turpentines, as indicated in any one report, are not greater than the 

 differences reported for the same sample by different manufacturers. 



(3) Although the odor is the property most emphasized, there is no unanimity 

 of opinion as to the comparative odors of the different samples; in most cases 



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