others are such as naturally to discourage all expectation of useful products from gilsonite.
Days work avowedly failed of attaining the definite information that he sought regarding the nature of gilsonite; 

and his own tentative conclusions go very little further than that distillation of gilsonite is unpromising, and that future work on the substance should be along the lines of direct treatment with reagents such as nitric and sulphuric acids, according to a method outlined as a result of his investigation.

 The vague state of the world’s informas I I 1 3 tion regarding gilsonite prior to my invention is well illustrated in a paper by Day entitled Investigation of Utah gilsonite, a variety of asphalt read June 18, 1895, before the chemical se tion of the Franklin Institute (Journal 0 the Franklin Institute, Vol. 140, pp.