M (1) 43
# MINERALOGICAL ANALYSES.
The 213 samples of metals and ores examined during the Year comprised the following:-
Metals. Substance. Ores. Substance. Substance. 1926. 1925. Substance. 1926. 1925. Alloys 6 - Antimony 4 2 Antimony 11 1 Bauxite... 1 - Nickel Copper Silver Tin... 1 1 Bismuthite 336 22 Iron 23 - Lead 111 208 Manganese 2 - Tin Ore 1 - Lead 87 90 Wolfram 34 42 Total, 126 220 Galena 1 - Total, 87 90# WATER SUPPLIES.
Samples of drinking water from the public supplies to the number of 903 have been examined in the Laboratory during 1926. Of this number, 220 were specimens of filtered and unfiltered water taken at the various filter beds each month, and the remainder were tap samples taken of the water as it reaches the consumer. These were taken by the laboratory staff from taps in various parts of the City.
The colour of the water has on the whole been satisfactory, most of the City supplies averaging well below 10 Lovibond colour units in the 24 inch tube. The worst filtered water examined was that supplied by the Aberdeen filter beds in April which gave a reading of 79.4 colour units. No nitrites, nor heavy metals were found in any of the filtered or unfiltered waters examined, nor has the albumenoid ammonia in any case exceeded 0.0100 parts per 100,000; in nearly all specimens it was below 0.004 and usually below 0.002.
# SPECIAL REPORTS.
Special Reports have been prepared during the year on "Proof Spirit in Cassia Oil", "Kerosene in Cassia Oil and its Detection", "Synthetic Cinnamic Aldehyde in Cassia oil", "The Composition of Chinese Insect Wax", "Insect Sprays" and "Oxygen for Medical Purposes."
M (1) 43
MINERALOGICAL ANALSES.
The 213 samples of metals and ores examined during the Fear comprised the following:-
Metals.
Ores.
Substance.
1926. 1925.
Substance.
1926. 1925.
Alloys
6
Antimony
11
1
Antimony
4
Bauxite...
1
Nickel Copper Silver Tin...
Bismuthite
336
22
2
Iron
1
1
-
Manganese
23
Lead
111 2
208
Tin Öre
1
Wolfram
34
42
Galena
1
Total,.............. 126
220
87
• 90
WATER SUPPLIES.
Samples of drinking water from the public supplies to the number of 903 have been examined in the Laboratory during 1926. Of this number, 220 were specimens of filtered and unfiltered water taken at the various filter beds each month, and the remainder were tap samples taken of the water as it reaches the consumer. These were taken by the laboratory staff from taps in various parts of the City.
+
The colour of the water has on the whole been satisfactory, most of the City supplies averaging well below 10 Lovibond colour units in the 24 inch tube. The worst filtered water examined was that supplied by the Aberdeen filter beds in April which gave a reading of 79.4 colour units. No nitrites. nor heavy metals were found in any of filtered or unfiltered waters examined, nor has the albumenoid ammonia in any case exceeded 0.0100 parts per 100,000; in nearly all specimens it was below 0.004 and usually below 0.002.
SPECIAL REPORTS,
Special Reports have been prepared during the year on "Proof Spirit in Cassia Oil", "Kerosene in Cassia Oil and its Detection", "Synthetic Cinnamic Aldehyde in Cassia oil", "The Composition of Chinese Insect Wax", "Insect Sprays" and "Oxygen for Medical Purposes.
No comments yet.
Private notes are available after approval.