Both Temperature and Relative Humidity are against a Reduction in Power.

50.5

Shop Readings of Units.

Total number of units for two weeks before the change was made in

Total number of units for two weeks after the New Oils were put in use.

920

Reduction,

360

or 28.1 per cent.

At a price of 1% d. per unit this saving for two weeks represented £1.13.9 ($8.16). The cost for oil was practically the same.

Machinery Operated-Transmission, Planing Machines, Lathes, Drills, Milling, Grinding, Turning and Polishing Machines.

Complete Test - 4 days. 320 indicator cards. 4 operators.

Engine, Shafting, and all Machines running light.

1905.

1905.

Mill Oils.

1905.

Difference of Averages .77 H.P. or 0.6 per cent. on Average of Test.

Second Test.

Wednesday, August 16,
Thursday, August 17,

116.02 114.30
115.23 1.72
118.47 114.48 40 116.80
3.99
116.01

40

1.5

3.4

Difference of Averages 1.57 H.P. or 1.4 per cent. on Average of Test.

Shop Oils.

Engine and Transmission.

Number of

Cards.

74.86

Difference of Averages 2.91 H.P. or 3.9 per cent. on Average of Test.

New Oils.

Difference of Averages 1.48 H.P. or 2.2 on Average of Test.

68.80 1.52
67.32

2.2

1.68

2.5

Result of Test.

Engine, Shafting and Machines (Running Light).

Engine-Galloways, Manchester. and 20" x 30" stroke.

ing about 80 I.H.P.

Diagonal Compound, non-condensing. 12" Steam Pressure 90 lbs. 88 R.P M. DevelopBelt drive to counter shaft.

Machinery Operated-Line and counter shaft. High speed circular saws. Planing, moulding, mortising and tenoning machines. Lathes, drills, etc., as used in a first class Joiner's Shop.

The line shafts were all under the floor and driven up to the machines on the next floor.

Complete Test

-2 days. 4 indicators. 320 indicator cards. 3 operators.

Under the old conditions of working with previous Grease (which was
used for lubricating the line shaft) the average temperature of

six bearings on line shaft above the temperature of the surround-
ing atmosphere was,

Under the New Oil the average temperature of the same six bearings
above the surrounding room temperature (same thermometers
and observers) was, ·

Fahr.

41.7

15.2

31.9

or 67.7 per cent.

Temperatures and Relative Humidity.

Averages from Half Hour Readings During Test.

Temperature of the atmosphere against a reduction in power. Relative Humidity in favor of a reduction of power. (Humidity effects a test of this kind the opposite to the effect upon a Textile

Mill.)

During the first test upon the Shop Oil December 2, 1905, it was found impossible to run all the machinery light as the load was too great for the engine.

During the second test the engine could easily carry the load of all the machines running light.

The same number of machines are in operation for the official figures for each test given above.