equally
careful examination of diagrams taken from it when running on full
load. Also careful examination of the piping, and of any other
connections between the air pump and condenser, or other auxiliaries. It
will be well in this examination to note the general "lay" of the air
pipes, length, hight to which they rise above condenser and air pump,
facilities for drainage, etc., as this information may prove valuable in
determining the course necessary to rectify deficiencies which may later
be found to exist.

(2) In a surface condenser, inspection of the pumps delivering condensed
steam to the measuring tanks or hot-well; inspection of piping between
the condenser and the pump, and also between the pump and measuring
tanks. If these pumps are of the centrifugal type it is essential to
insure, for the purposes of a steam-consumption test, as much regularity
of delivery as possible.

(3) In the case of a consumption test upon a turbine exhausting into a
barometric condenser, and where the steam consumed is being measured by
the evaporation in the boiler over the test period, time must be devoted
to the feed-pipes between the feed-water measuring meter or tank and the
boilers. Under conditions similar to those operating in a plant such as
that shown in Fig. 72, the necessary boiler feed might be drawn from the
hot-well, the remainder of the hot-well contents probably being pumped
through water coolers, or towers, for circulating through the condenser.
With the very best system, it is possible for a slight quantity of oil
to leak into the exhaust steam, and thence to the hot-well. In its
passage, say along wooden conduits, to the measuring tank or meter, this
water would probably pass through a number of filters. The efficiency of
these must be thoroughly insured. It is unusual, in those cases where a
simple turbine steam-consumption test is being carried out, and not an
efficiency test of a complete plant, to pass the measured feed-water
through economizers. Should the latter course, owing to special
conditions, become necessary, a careful examination of all economizer
pipes would be necessary.

(4) The very careful examination of all thermometer pockets, steam- and
temperature-gage holes, etc., as to cleanliness, non-accumulation of
scale, etc.

Special Auxiliaries Necessary

Having outlined the points of interest and importance in connection with
the more permanent features of a plant, we arrive at the prepara