Reports of Dr. Parkes and Dr. Sanderson, on the sanitary condition of Liverpool.

  • Parkes, Edmund A. (Edmund Alexander), 1819-1876.
Date:
[1871]
Catalogue details

Licence: Public Domain Mark

Credit: Reports of Dr. Parkes and Dr. Sanderson, on the sanitary condition of Liverpool. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    The following table shows the composition of the powder, in 100 parts ; the solids, the water and the indestructible substances being given, tho latter consisted of the ash of coal and mineral matters from the road sweepings. Composition of Powder. In 100 lbs. No. I. CS £ No. 3. No. 4. No. 5. No. 6. Solids. 74.S 62.9 82. 76.3 82.6 73.5 Water. 25.2 37.1 j 18. 1 23.7 17.4 26.5 Ash and mineral matter left on incineration. 37.8 52. ! 45.8 56.96 66.78 47.4 In order to determine the amount of the nitrogenous constituents of the powder the following plan was adopted. The total nitrogen was estimated by burning with soda-lime; the amounts of ammonia and nitric acid were also determined by washing 1 part of the powder in 100 parts of cold distilled water and then determining the amount of the ammonia by distillation with caustic soda and of nitric acid by the Schultzo-Wanklyn process. The following table gives the results. « Table to show the amount of ammonia and nitric acid and nitrogen as deter- mined by burning with soda-lime. No. In 100 parts of the “Powder.” Ammonia. Nitric Acid /HNO | Nitrogen by burning with Soda Lime. 1 ■00422 •1034 852 2 ■00164 •0275 •390 3 •00138 •0545 •497 4 •00512 0411 •426 5 •00180 0470 •177 6 •00160 ■0285 •372 The object of these determinations was to see first whether the powder was largely contaminated with nitrogenous substances or their derivatives, and whether in process of time any amount of purification had taken place. The analyses showed much organic impregnation, and also that ammonia and