3 go NEW YORK STATE MUSEUM 



nos. 2 and 3. It differed from the latter, however, in having prac- 

 tically none of the light flaky precipitate noted above. 



Wash 5. Prepared Ap. 4. The lime was added to almost boil- 

 ing water, and when the slaking began, the carbonate of soda was 

 put in, followed immediately by the sulfur. The chemical action 

 was rather slow and the sulfur dissolved somewhat slowly. At the 

 end of 15 minutes a considerable combination had been effected, 

 though there were a few flakes of sulfur. Examination on the 

 morning of the 5th showed that the precipitate was fine and the 

 clear liquid above was a pale brick-red. Combination was per- 

 haps not quite equal to that of wash i. 



Wash 6. Prepared Ap. 4. Water was not quite as warm when 

 the lime was added, as in the previous combination and conse- 

 quently slaking was much slower. The carbonate of soda was 

 added and sulfur immediately thereafter. The chemical action was 

 much slower, the solution :more flaky and of a deeper red color 

 than in no. 5. Examination the 5th showed that the colored 

 liquid above was slightly darker in color, while the precipitate 

 seemed to be as fine as that in no. 5. 



Wash 7. Prepared Ap. 4. The lime was added to boiling 

 water and slaking began immediately. Carbonate of soda was 

 then put in and followed at once by sulfur. Chemical action was 

 prompt and an orange color was obtained much sooner than in 

 either nos. 5 or 6. At the end of 15 minutes there were less flaky 

 particles and the wash was more perfect than no. 6, though the 

 color was about the same. Examination on the morning of the 

 5th showed practically no changes. 



Wash 8. Prepared Ap. 4. Water was brought to a boil, the 

 lime added, and after it was well slaked the sodium sulfid was 

 put in. A dirty bluish green or slate-colored solution was formed. 

 The precipitate is somewhat coarser than that in either washes 

 I, 5, 6 or 7 and appeared to settle much more rapidly, leaving 

 above a clear colorless liquid. If the color is any indication, 

 there was practically no combination between the lime and the 

 sulfur in the sodium sulfid. 



Wash 9. Prepared Ap. 4. The lime was added to the water 

 when it was nearly boiling and allowed to slake; sulfur was then 

 put in, and in about 30 seconds the sodium sulfid was added. The 

 color appeared in a very short time, a purplish tinge was noted, 

 which changed to green, and after six minutes boil to orange 

 which remained in evidence during the entire 15 minutes. An 

 examination on the 5 th showed that this precipitate was hardly 



