Report to the Local Government Board / by R. Angus Smith.

  • Smith, Robert Angus, 1817-1884.
Date:
1882
Catalogue details

Licence: Public Domain Mark

Credit: Report to the Local Government Board / by R. Angus Smith. Source: Wellcome Collection.

    23/136 (page 17)
    >-No HNO, formed. 100 c. c. not filtered, kept in a bottle half a day, 014!8 msm. HNO3. ^' B 100 c. c. of the water used, filtered through sand from December 2nd to December 20th, 1874, O'OO. The remaining portions were again filtered till 28th January 1875, making altogether 46 days, when—■ 1st gave - - - 0163 mgm. HNOj. 2nd „ - - _ 0-148 „ Pure water - 0-00. There is a slight increase in the amount of HNO3 by filtra- tion from the 2nd to 20th December, 18 days; and afterwards to January 28th, the 46 th day, there is a decrease, but not so small as in the unfiltered portion. Pure water filtered through the sand for 46 days remained free from HNOg. Ozonized air with phosphorus vapour aspirated through water containing milk, and water made alkaline containing yeast. January 1875. Through 50 c. c. water containing 0-01~^ per cent, yeast for 85 hours, extending i ^ TTivn -p over 5 days, strong reaction to ozone H^O, termed, paper _ _ _ Through 50 c. c. water containing 0*01 per cent, milk for 69 hours; 50 c. c. of caustic soda pure were then added, and the ozonized air again aspirated for 95 hours, altogether 164 hours After passing the O'Ol per cent, milk] solution, the ozonized air was aspirated. I TTxrrk through water containing O'Ol per cent. ( ° termed. yeast for 164 hours - _ -J And finally through another 50 c. c. water] containing 0*01 per cent, yeast for 164 INo HNO3 formed. hours - - _ J When the aspiration was stopped all the liquids were alkaline, and gave a reaction with ozone paper. Each portion smelled of phosphorus. Permanganate and yeast:— 0*3 grm. yeast mixed with water and] permanganate of potassium, stood I No HNO, formed. 20 days - - J Hydrogen peroxide and yeast:—' 0-3 grm. yeast mixed with water and 25 c. c. H-,02 solution, stood 20 days. The 0-3 grm. yeast contained before! ^ ^^^^^ mixture- - - _j-0-444 mgm. HNO;, After mixture with H,0, solution, 1 and standing 20 days ' - .j-0-193 mgm. HNO,, There has been a decrease in the amount of HNO,. J' Q 7516. 3