| | | | 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.]

~Table 8--Average Consumption of Water for
Twenty-four Hours, Per Million Gallons.~
==========+================================================
| ~Fiscal years.~
Month. +-----+-----+-----+-----+-----+-----+-----+------
|1903.|1904.|1905.|1906.|1907.|1908.|1909.|1910.
----------+-----+-----+-----+-----+-----+-----+-----+------
July |59.80|61.50|63.20|69.80|69.18|68.64|71.08|64.05
August |59.00|59.70|67.70|71.40|68.03|67.74|68.14|61.42
September |56.50|61.10|67.90|71.30|69.82|68.93|65.83|60.32
October |58.70|59.10|63.90|68.40|69.14|66.46|65.89|59.18
November |54.70|58.60|62.10|66.10|65.51|61.54|60.06|55.25
December |60.70|60.10|70.30|67.20|65.71|62.29|57.99|56.77
January |60.10|65.30|75.10|65.30|67.62|63.36|57.72|62.49
February |59.30|67.80|86.00|68.70|74.68|68.17|55.42|60.28
March |55.30|60.00|67.60|64.30|64.23|59.63|55.31|56.04
April |55.10|57.20|63.10|62.70|63.45|61.51|58.19|58.32
May |57.70|60.80|66.30|65.60|62.47|62.96|59.25|57.76
June |59.50|62.30|70.60|67.80|63.53|67.96|60.12|58.37
----------+-----+-----+-----+-----+-----+-----+-----+------
Average |58.03|61.10|68.70|67.40|66.90|64.91|61.47|59.19
==========+=====+=====+=====+=====+=====+=====+=====+======

The length of runs, depth of scraping, etc., after the scraping or
raking, are shown in Tables 10 and 11.

_Sand Handling._--For the first three years of operation, the sand
was carried from the sand bins in carts and dumped through the
numerous manholes of the filters on chutes which could be revolved
in various directions, in order to facilitate the spreading of the
sand evenly over the surface of the filter.

About a year ago, however, this method was changed, b