42 ('olIc(jc of Forestry 



trah'd wodd as from the sound woixl. iJotb residues Avere 

 dark brown in color and cxliil)itcd a contdioidal fracture. 

 The one from the infiltrated "wood was of the deeper hno. 



Both .alcoholic extracts were insolulde in cold or Ijoiling 

 water, ' coucentrated hydrochloric acid, ether, petroleum 

 ether, chloroform, carbon Insulphide, and carbon tetra- 

 chloride. Their specific gravities are indicated by the fact 

 that they were not suspended in or floated upon any of the 

 organic solvents tried of which the heaviest, carbon tetra- 

 chloride, has a specific gravity of 1.63. Neither, however, 

 sank in concentrated sulphuric acid, whose specific gTavity 

 is 1.S4. Both alcoholic extracts, howe\^r, were soluble in 

 cold absolute alcohol, acetone, and a 10 per cent solution of 

 sodium hydroxide. When the last named solution was 

 neutralized with sul])liuric acid tlio extracts, in l)oth cases, 

 were precipitated — that is to say they were insoluble in the 

 exactly neutral sodiuiu sulphate solution tlius prepared. I'oth 

 alcoholic extracts were soluble to a brown solution, but dis- 

 solved more slowly and without carbonization, when shaken 

 in cold concentrated sulphuric acid. The alcoholic extract 

 from the infiltrated wood was soluble in cold ammonium 

 hydroxide, whereas that from the sound wood was soluble 

 only by heating the reagent to boiling. When hydrochloric 

 acid was added to the ammoniacal solutions until they were 

 slightly acid both extracts were })rccipitated, leaving the solu- 

 tions colorless in both cases. 



l^one of the treatments thus far applied have secured a 

 separation of tlie substances ]K'Culiar to the infiltrated wood 

 and giving to it its distinguishing color. The solubilities and 

 other properties of the respective extracts indicate that they 

 are, for the most part, made up of like substances and in the 

 case of the infiltrated wood, in addition to the materials orig- 

 inally present in the sound wood, there is present one or more 

 decomposition ]U'oducts which, for a time at least, are little 

 or not at all affected by the fungus producing the decomposi- 



