Chapter 2

~Table 4--Bacteria.~ Averages by Months. =============+======================================================= | ~Reservoirs:~ +----------+----------+----------+-------------+-------- Month. | | | | | |Dalecarlia|Dalecarlia|Georgetown|McMillan Park|Filtered | Inlet. | Outlet. | Outlet. | Outlet. | water. -------------+----------+----------+----------+-------------+-------- 1905. -------------+----------+----------+----------+-------------+-------- October | ... | ... | ... | 210 | 80 November | ... | ... | ... | 150 | 27 December | ... | 15,500 | ... | 3,800 | 60 -------------+----------+----------+----------+-------------+-------- 1906. -------------+----------+----------+----------+-------------+-------- January | ... | 2,800 | ... | 1,500 | 39 February | 2,900 | 4,100 | 1,800 | 550 | 16 March | 1,800 | 1,100 | 900 | 650 | 19 April | 3,300 | 1,700 | 700 | 400 | 22 May | 425 | 210 | 95 | 65 | 17 June | 7,900 | 4,600 | 325 | 220 | 17 July | 13,500 | 600 | 475 | 160 | 26 August | 8,700 | 1,100 | 1,200 | 190 | 14 September | 425 | 250 | 140 | 135 | 14 October | 2,300 | 950 | 650 | 270 | 16 November | 1,800 | 1,100 | 1,200 | 220 | 12 December | 6,900 | 3,800 | 3,600 | 700 | 45 -------------+----------+----------+----------+-------------+-------- 1907. -------------+----------+----------+----------+-------------+-------- January | 4,400 | 2,400 | 2,200 | 950 | 70 February | 1,000 | 950 | 1,000 | 700 | 45 March | 11,500 | 8,300 | 7,200 | 3,600 | 65 April | 3,700 | 2,100 | 1,400 | 475 | 21 May | 750 | 350 | 325 | 130 | 26 June | 2,300 | 1,000 | 600 | 100 | 18 July | 2,700 | 575 | 350 | 160 | 17 August | 3,000 | 275 | 425 | 80 | 17 September | 6,200 | [1] | 1,900 | 230 | 32 October | 1,400 | [1] | 950 | 275 | 27 November | 8,900 | [1] | 6,600 | 1,500 | 27 December | 16,000 | [1] | 9,600 | 4,300 | 190 -------------+----------+----------+----------+-------------+-------- 1908. -------------+----------+----------+----------+-------------+-------- January | 11,000 | 8,700 | 9,400 | 3,700 | 190 February | 11,500 | 6,000 | 5,000 | 2,800 | 75 March | 4,600 | 4,000 | 2,900 | 1,300 | 30 April | 700 | 450 | 250 | 120 | 13 May | 9,500 | 1,100 | 650 | 325 | 17 June | 750 | 120 | 110 | 95 | 12 July | 4,900 | ... | 400 | 150 | 8 August | 1,600 | 325 | 300 | 100 | 12 September | 325 | [1] | 200 | 80 | 11 October | 375 | [1] | 325 | 140 | 8 November | 550 | [1] | 300 | 200 | 12 December | 800 | 750 | 375 | 170 | 23 -------------+----------+----------+----------+-------------+-------- 1909. -------------+----------+----------+----------+-------------+-------- January | 11,000 | 2,700 | 1,600 | 700 | 31 February | 8,000 | 3,500 | 2,400 | 1,300 | 60 March | 3,800 | [1] | 2,600 | 1,000 | 39 April | 2,200 | [1] | 1,400 | 550 | 12 May | 900 | [1] | 350 | 140 | 16 June | 3,400 | [1] | 1,200 | 170 | 21 July | 550 | [1] | 500 | 250 | 33 August | 400 | [1] | 325 | 55 | 18 September | 325 | 240 | [1] | 70 | 18 October | 350 | 275 | 250 | 130 | 20 November | 600 | 500 | 500 | 180 | 13 December | 21,000 | 9,100 | 5,900 | 4,500 | 250 -------------+----------+----------+----------+-------------+-------- 1910. -------------+----------+----------+----------+-------------+-------- January | 76,000 | 78,000 | 88,000 | 52,000 | 800 February | 45,000 | 35,500 | 31,000 | 17,500 | 350 March | 9,900 | 7,600 | 7,400 | 4,800 | 80 April | 7,900 | 4,100 | 3,500 | 650 | 29 May | 1,230 | 810 | 830 | 448 | 28 June | 3,660 | 930 | 800 | 324 | 27 -------------+----------+----------+----------+-------------+-------- Fiscal years: -------------+----------+----------+----------+-------------+-------- 1905-06 | 3,300[2]| 4,300[3]| 750[4]| 850[2]| 33[2] 1906-07 | 4,900 | 1,900 | 1,700 | 650 | 31 1907-08 | 6,360 | 2,700 | 2,900 | 1,300 | 55 1908-09 | 3,400 | 2,000 | 950 | 400 | 21 1909-10 | 14,300 | 13,900 | 10,900 | 6,890 | 143 =============+==========+==========+==========+=============+========

[Footnote 1: Reservoirs out of service.]

[Footnote 2: October to June 30th.]

[Footnote 3: December to June 30th.]

[Footnote 4: February to June 30th.]

~Table 5--Results of Tests for~ _Bacillus Coli_. Percentage Positive. =============+==============+==============+=============== | Great Falls, | Dalecarlia | |or Dalecarlia | Reservoir | Georgetown | Reservoir | Outlet. | Reservoir. Month. | Inlet. | | +----+----+----+----+----+----+----+----+----- | 10 | 1 |0.1 | 10 | 1 |0.1 | 10 | 1 |0.1 |c.c.|c.c.|c.c.|c.c.|c.c.|c.c.|c.c.|c.c.|c.c. -------------+----+----+----+----+----+----+----+----+----- 1906. -------------+----+----+----+----+----+----+----+----+----- January[1] |55.6|38.9|22.2|69.2|23.1| 7.7|56.0|40.0| 8.0 February |33.3|26.7| 6.7|26.1|17.4| 8.7|30.4|13.0| 4.4 March |50.0|12.5| 0|45.5|18.2| 0|20.8| 8.3| 0 April |72.2|33.3|16.7|95.5|50.0| 4.6|59.1|22.7| 4.6 May |20.0| 8.0| 4.0|20.0|12.0| 0| 7.8| 0| 0 June |57.7|38.5|19.2|40.0|32.0| 8.0|50.0|34.6| 0 July |65.0|50.0| 5.0|60.0|25.0|10.0|15.0| 5.0| 5.0 August |84.6|69.2|61.5|88.5|65.4|34.6|80.0|57.7|23.1 September |50.0|10.0| 0|30.0|10.0|10.0|40.0|10.0| 0 October |60.0|30.0|10.0|55.5|33.3| 0|80.0|60.0|20.0 November |37.5| 0| 0|25.0|12.5|12.5|37.5|25.0| 0 December |55.5|44.5| 0|66.7|44.5|22.2|66.7|22.2| 0 -------------+----+----+----+----+----+----+----+----+----- 1907. -------------+----+----+----+----+----+----+----+----+----- January |77.8|33.3|22.2|66.7|33.3| 0|55.5|55.5|22.2 February |37.5|25.0| 0|12.5| 0| 0|37.5|12.5| 0 March |87.5|50.0| 0|75.0|37.5| 0|50.0|25.0| 0 April |44.5|11.1|11.1|66.7|22.2|11.1|77.8|11.1|11.1 May |91.3|65.2|17.4|88.9|33.3| 0|87.5|50.0|12.5 June |80.0|68.0|24.0|87.5|62.5| 0|66.7|44.5|11.1 July |42.3|30.8|19.2|25.0|12.5| 0|22.2|22.2| 0 August |48.1|29.6| 3.7|33.3|16.7|16.7|36.4|18.2| 0 September |62.5|54.1|25.0| ...| ...| ...|41.7|33.3|16.7 October |51.9|40.8| 7.4| ...| ...| ...|53.3|40.0| 6.7 November |80.0|64.0|24.0| ...| ...| ...|72.7|54.5| 0 December |56.0|48.0|16.0| ...| ...| ...|46.2|38.5| 7.7 -------------+----+----+----+----+----+----+----+----+----- 1908. -------------+----+----+----+----+----+----+----+----+----- January |46.2|30.8|15.4|50.0|12.5| 0|33.3| 0| 0 February |12.5| 0| 0|25.0| 0| 0|12.5| 0| 0 March |38.5|19.2| 7.7|44.4|11.1| 0|11.1| 0| 0 April |15.4| 7.7| 0| 0| 0| 0| 0| 0| 0 May |76.0|52.0|40.0|87.5|50.0|12.5|33.3|22.2| 0 June | 7.7| 0| 0| 0| 0| 0|11.1| 0| 0 July |26.9|15.4|11.5|22.2|22.2| 0|11.1| 0| 0 August |46.2|26.9| 3.9|44.4|33.3| 0|62.5|25.0|12.5 September |20.0| 8.0| 4.0|42.9|28.6| 1.4|22.2|11.1| 0 October |18.4| 3.7| 0| 0| 0| 0| 9.1| 0| 0 November |13.0| 0| 0|28.6| 0| 0|11.1| 0| 0 December |11.5| 7.7| 3.8| 0| 0| 0|12.5| 0| 0 -------------+----+----+----+----+----+----+----+----+----- 1909. -------------+----+----+----+----+----+----+----+----+----- January |12.0| 8.0| 0|30.0|10.0| 0| 0| 0| 0 February |52.1|47.8|47.8|28.6|14.3| 0|37.5| 0| 0 March |69.4|34.6| 3.8|50.0|25.0| 0|44.5|11.1| 0 April |42.3|15.4| 3.9|33.3|22.2|11.1|44.4|22.2|11.1 May |88.4|26.1| 4.3|50.0|12.5| 0|33.3| 0| 0 June |85.0|60.0|25.0|60.0|40.0|10.0|44.4|33.3|11.1 July |34.8| 8.7| 4.4| ...| ...| ...|33.3|11.1| 0 August |50.0|15.4| 7.7| ...| ...| ...|40.0|10.0| 0 September |43.5|21.8| 8.7|25.0|25.0|12.5| 0| 0| 0 October |36.4|13.6| 0|18.2| 0| 0| 0| 0| 0 November | 4.5| 0| 0|10.0| 0| 0| 0| 0| 0 December |38.5|23.1| 7.7|36.4|36.4|18.2|33.3|22.2|11.1 -------------+----+----+----+----+----+----+----+----+----- 1910. -------------+----+----+----+----+----+----+----+----+----- January |72.0|48.0|24.0|44.5|33.3|11.1|75.0|25.0| 0 February |47.8|43.5|17.4|63.2|21.1| 5.3|40.0|30.0| 5.0 March |33.3|14.8| 0|30.8|11.1| 3.7|29.6|22.2| 7.4 April |41.7|33.3|20.8|40.0|32.0|16.0|38.5|23.1|15.4 May |47.8|17.4| 0|52.0|20.0| 0|36.0|16.0| 4.0 June |95.5|86.4|31.8|80.8|46.2|19.2|64.0|28.0| 8.0 -------------+----+----+----+----+----+----+----+----+---- Fiscal years: -------------+----+----+----+----+----+----+----+----+----- 1905-06 |35.2|19.4|9.3 |0.0 |3.2 |5.2 |6.4 |4.9 |1.7 1906-07 |61.5|43.6|9.2 |7.7 |9.2 |2.3 |1.1 |9.8 |0.7 1907-08 |44.6|31.3|3.0 |2.3 |2.3 |3.1 |4.4 |2.1 |4.1 1908-09 |38.9|20.3|8.4 |0.0 |5.0 | 0 |7.4 |8.5 |2.8 1909-10 |45.5|26.9|0.1 |5.3 |4.0 |8.8 |7.9 |9.8 |6.2 =============+====+====+====+====+====+====+====+====+=====

=============+==============+=========+========== |McMillan Park |Filtered-|Tap water | Reservoir | water |from var- | (applied | reser- |ious parts Month. | water). | voir. |of city. +----+----+----+----+----+----+----- | 10 | 1 |0.1 | 10 | 1 | 10 | 1 |c.c.|c.c.|c.c.|c.c.|c.c.|c.c.|c.c. -------------+----+----+----+----+----+----+----- 1906. -------------+----+----+----+----+----+----+----- January[1] |55.6|22.2| 0 | 7.2| 0| ...| ... February | 8.3| 4.2| 0 | 0| 0| ...| ... March |18.5| 7.4|3.7 | 0| 0| 0| 0 April |32.0| 8.0| 0 | 4.0| 0| 0| 0 May | 0| 0| 0 | 0| 0| 0| 0 June |23.1| 7.7|3.8 | 0| 0| 3.1| 0 July | 9.5| 0| 0 | 4.8| 0| ...| ... August |63.0|33.3| 0 | 7.4| 3.7|11.9| 5.1 September |32.0|12.0| 0 | 8.0| 0| 3.1| 0 October |48.1|22.2|3.7 | 3.7| 0|13.0| 3.7 November |20.0|12.0| 0 | 8.0| 0| 0| 0 December |20.8| 8.3|4.2 |16.7| 8.3| 7.5| 0 -------------+----+----+----+----+----+----+----- 1907. -------------+----+----+----+----+----+----+----- January |69.3|34.6|3.8 |19.2|11.5|14.0| 0 February |17.4| 4.4| 0 | 0| 0| 2.9| 0 March |30.8| 7.7| 0 | 0| 0| 2.1| 0 April |46.1|19.2|3.8 | 3.8| 0| 3.2| 0 May |23.1| 0| 0 | 0| 0| 1.4| 0 June |40.0| 8.0| 0 | 0| 0| 0| 0 July | 3.8| 0| 0 | 0| 0| 1.4| 1.4 August |14.8| 3.7| 0 | 0| 0| 0| 0 September |16.0| 4.0| 0 | 4.0| 0| 1.7| 0 October |38.7|25.8|9.7 | 6.5| 0|12.5| 2.8 November |58.6|17.3|3.5 | 0| 0| 4.9| 0 December |45.2|29.0| 0 |19.3| 3.2|12.9| 4.3 -------------+----+----+----+----+----+----+----- 1908. -------------+----+----+----+----+----+----+----- January |22.6| 9.7|3.2 | 3.2| 0| 1.9| 1.9 February | 0| 0| 0 | 0| 0| 0| 0 March | 9.7| 0| 0 | 0| 0| 0| 0 April | 6.7| 3.3| 0 | 0| 0| 0| 0 May |45.1|16.2| 0 | 0| 0| 0| 0 June | 0| 0| 0 | 0| 0| 0| 0 July | 6.4| 6.4| 0 | 0| 0| 0| 0 August |12.9| 3.2| 0 | 0| 0| 1.6| 0 September |16.7|10.0| 0 | 0| 0| 4.3| 0 October | 9.7| 6.4|3.2 | 0| 0| 0| 0 November | 6.6| 0| 0 | 0| 0| 0| 0 December | 3.2| 0| 0 | 0| 0| 0| 0 -------------+----+----+----+----+----+----+----- 1909. -------------+----+----+----+----+----+----+----- January | 3.2| 3.2| 0 | 3.2| 0| 0| 0 February | 7.1| 3.6|3.6 | 0| 0| 3.4| 3.4 March |32.3|19.4|3.2 | 6.5| 0| 2.8| 1.4 April |36.6|10.0| 0 | 0| 0| 0| 0 May |12.9| 3.2| 0 | 0| 0| 0| 0 June |53.3|20.0| 0 | 0| 0| 1.4| 0 July |25.8|12.9| 0| 0| 0| 0| 0 August |22.6| 6.5| 3.2| 0| 0| 0| 0 September |13.3| 3.3| 0| 0| 0| 0| 0 October | 3.2| 0| 0| 0| 0| 0| 0 November | 0| 0| 0| 0| 0| 0| 0 December |29.0|22.6| 0| 9.7| 6.5| 7.3| 1.5 -------------+----+----+----+----+----+----+----- 1910. -------------+----+----+----+----+----+----+----- January |61.3|35.5|9.7 | 5.8| 3.2|15.9| 3.2 February |32.2| 7.1| 0 | 3.6| 0| 0| 0 March |12.9| 3.2| 0 | 0| 0| 0| 0 April |23.3|13.3| 0 | 0| 0| 0| 0 May |16.1|12.9| 0 | 0| 0| 0| 0 June |43.3| 6.7| 0 | 0| 0| 1.4| 0 -------------+----+----+----+----+----+----+----- Fiscal years: -------------+----+----+----+----+----+----+----- 1905-06 |4.3 |8.3 |.8 | .3| 1.8| 1.3| 0 1906-07 |2.5 |3.0 |.4 | .5| 2.1| 5.4| 1.0 1907-08 |2.2 |9.4 |.4 | .8| 0.3| 3.1| 0.9 1908-09 |6.7 |7.1 |.8 | .8| 0| 1.2| 0.4 1909-10 |3.6 |0.4 |.1 | .3| 0.8| 2.2| 0.4 =============+====+====+====+====+====+====+=====

[Footnote 1: Presumptive tests.]

~Table 6--Summary of Sanitary Chemicals Analyses of Weekly Samples, July 1st, 1909, to June 30th, 1910.~ (Results in Parts per Million.)

Columns: A - Turbidity[1] B - Free C - Albuminoid D - Total E - Nitrites F - Nitrates G - Hardness H - Alkalinity I - Chlorine

(_A_) ~Maximum.~ ====================+=====+=================+===========+=====+=====+==== | | Ammonia. | Nitrogen | | | | | | as: | | | Reservoirs. | A +-----+-----+-----+-----------+ G | H | I | | B | C | D | E | F | | | --------------------+-----+-----+-----+-----+------+----+-----+-----+---- Dalecarlia inlet |2,100|0.034|0.264|0.280|0.0070|0.45|120.0|106.0|5.4 Dalecarlia outlet[2]| 200|0.034|0.180|0.206|0.0050|0.70|115.0|105.8|5.7 Georgetown outlet[3]| 215|0.030|0.182|0.182|0.0060|0.60|115.0|105.0|4.9 McMillan Park outlet| 120|0.028|0.126|0.154|0.0060|0.65|118.0|104.4|4.2 Filtered water | 9|0.016|0.078|0.086|0.0010|0.70|119.5|106.3|4.5 --------------------+-----+-----+-----+-----+------+----+-----+-----+---

~Table 6~--(_Continued._) (_B_) ~Minimum.~ ====================+=====+=================+===========+=====+=====+==== | | Ammonia. | Nitrogen | | | | | | as: | | | Reservoirs. | A +-----+-----+-----+-----------+ G | H | I | | B | C | D | E | F | | | --------------------+-----+-----+-----+-----+------+----+-----+-----+---- Dalecarlia inlet | 7|0.000|0.016|0.016|0.0000|0.00| 52.9| 39.5| 1.0 Dalecarlia outlet[2]| 7|0.000|0.040|0.040|0.0000|0.00| 54.3| 38.2| 0.9 Georgetown outlet[3]| 7|0.000|0.044|0.044|0.0000|0.00| 51.4| 40.6| 0.7 McMillan Park outlet| 2|0.000|0.010|0.010|0.0010|0.00| 51.4| 38.5| 0.2 Filtered water | 0|0.000|0.000|0.000|0.0000|0.00| 52.9| 40.3| 0.4 --------------------+-----+-----+-----+-----+------+----+-----+-----+----

~Table 6~--(_Continued._) (_C_) ~Average.~ ====================+=====+=================+===========+=====+=====+==== | | Ammonia. | Nitrogen | | | | | | as: | | | Reservoirs. | A +-----+-----+-----+-----------+ G | H | I | | B | C | D | E | F | | | --------------------+-----+-----+-----+-----+------+----+-----+-----+---- Dalecarlia inlet | 86 |0.006|0.167|0.113|0.0027|0.19| 93.2| 81.4| 2.9 Dalecarlia outlet[2]| 30 |0.008|0.106|0.114|0.0023|0.18| 95.5| 79.5| 3.4 Georgetown outlet[3]| 29 |0.005|0.101|0.106|0.0027|0.18| 93.4| 80.9| 2.9 McMillan Park outlet| 18 |0.004|0.077|0.081|0.0027|0.17| 94.0| 83.0| 2.7 Filtered water | 1 |0.002|0.027|0.029|0.0000|0.19| 94.9| 84.0| 2.8 ====================+=====+=====+=====+=====+======+====+=====+=====+====

[Footnote 1: Summary of daily samples of water.]

[Footnote 2: Reservoir out of service from July 1st to September 13th, 1909.]

[Footnote 3: Reservoir out of service from September 10th to October 4th, 1909.]

No chemical determinations were made during February, March, April, and May, 1910, on account of the rearrangement of the laboratory and equipment.

~Table 7--Daily Results at Pumping Station~. (_A_) =============+===================================+========+========== | ~Million gallons pumped:~ | | Pressure +-----------------+-----------------+ | at sand- | | | Lift | washer | To filters. | To sand washers.| to | pumps, Month. | | |filters.| per |-----+-----+-----+-----+-----+-----| | square | Max.| Min.|Ave. | Max.| Min.| Ave.| | inch. -------------+-----+-----+-----+-----+-----+-----+--------+---------- 1909. -------------+-----+-----+-----+-----+-----+-----+--------+---------- July |76.16|57.65|64.05|1.140|0.298|0.730| 24.18 | 110.0 August |69.31|54.44|61.42|0.629|0.157|0.441| 22.18 | 110.0 September |66.02|52.82|69.32|0.831|0.207|0.572| 22.26 | 110.0 October |78.50|48.12|59.18|0.761|0.060|0.467| 21.84 | 110.0 November |64.92|49.83|55.25|0.468|0.141|0.272| 20.49 | 110.0 December |67.83|48.32|56.77|0.307|0.039|0.174| 20.54 | 110.0 -------------+-----+-----+-----+-----+-----+-----+--------+---------- 1910. -------------+-----+-----+-----+-----+-----+-----+--------+---------- January |70.04|51.02|62.49|0.499|0.008|0.156| 22.43 | 110.0 February |70.79|55.19|60.28|0.284|0.041|0.173| 21.44 | 112.3 March |59.11|51.64|56.04|0.409|0.063|0.171| 19.76 | 120.0 April |66.53|53.79|58.32|0.715|0.167|0.474| 20.78 | 120.0 May |61.93|54.55|57.76|0.525|0.059|0.251| 20.30 | 120.0 June |70.49|50.42|58.37|0.281|0.124|0.207| 21.19 | 117.3 -------------+-----+-----+-----+-----+-----+-----+--------+---------- Fiscal years: -------------+-----+-----+-----+-----+-----+-----+--------+---------- 1909-10 |78.50|48.12|59.19|1.140|0.008|0.373| 21.45 | 113.3 -------------+-----+-----+-----+-----+-----+-----+--------+---------- 1905-06[1] |80.59|57.18|66.07|2.062|0.089|0.747| 21.71 | 107.4 1906-07 |80.29|57.44|66.89|2.120|0.023|0.580| 21.60 | 120.8 1907-08 |80.38|54.35|64.91|0.735|0.017|0.347| 22.20 | 125.0 1908-09 |78.93|47.83|61.47|0.875|0.060|0.453| 22.52 | 122.3 -------------+-----+-----+-----+-----+-----+-----+--------+----------

=============+==============+=============== |~Coal consumed|~Station duty, | per day in |per 100 lb. of Month. | tons.~ |coal consumed.~ |----+----+----+----+----+----- |Max.|Min.|Ave.|Max.|Min.|Ave. -------------+----+----+----+----+----+----- 1909. -------------+----+----+----+----+----+----- July |13.4| 8.4|10.8|67.8|52.3|61.4 August |12.4| 8.0|10.1|64.2|49.5|56.6 September |12.7| 8.7|10.5|61.0|48.9|55.1 October |13.4| 8.0|10.3|59.6|49.1|53.6 November |11.3| 7.9| 9.2|55.6|45.7|51.1 December |10.3| 8.5| 9.5|61.0|45.4|50.4 -------------+----+----+----+----+----+----- 1910. -------------+----+----+----+----+----+----- January |12.7| 9.1|10.4|59.6|49.8|54.9 February |12.3| 8.7|10.2|57.4|44.8|51.5 March |10.5| 7.8| 9.2|53.2|45.2|49.8 April |11.1| 8.1| 9.7|58.7|47.2|53.7 May |10.1| 7.4| 8.8|60.7|48.1|54.9 June |12.3| 7.4| 9.1|60.1|49.9|54.4 -------------+----+----+----+----+----+----- Fiscal years: -------------+----+----+----+----+----+----- 1909-10 |13.4| 7.4| 9.8|67.8|44.8|54.0 -------------+----+----+----+----+----+---- 1905-06[1] |14.8| 6.4| 8.9|79.6|48.2|62.8 1906-07 |15.0| 7.0|10.0|71.6|46.5|58.6 1907-08 |12.0| 7.2|9.6 |70.7|51.3|60.3 1908-09 |13.2| 7.0|10.0|74.0|45.7|57.7 -------------+----+----+----+----+----+----

[Footnote 1: Raw water shut off from city supply on October 5th.]

~Table 7~--(_Continued._) (_B_) ========+=======================+=========+==========+============= | | | Duty per | Cost of | | | 100 lb. | coal per Fiscal | Name of coal used. |Cost per | of coal |1,000,000 ft- Year. | | ton. | consumed.|lb. of work | | | | performed --------+-----------------------+---------+----------+------------- 1905-06 |George's Creek Big Vein| $3.34 | 62.8 | $0.00238 1906-07 |George's Creek Big Vein| 3.43 | 58.6 | 0.00261 1907-08 |George's Creek Big Vein| 3.75 | 60.3 | 0.00278 1908-09 |Orenda | 3.47 | 57.7 | 0.00268 1909-10 |Orenda |[1]3.15 | 54.0 | 0.00255 ========+=======================+=========+==========+=============

[Footnote 1: Corrected for increase or decrease in ash and British thermal units, as determined by United States Geological Survey.]