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Frictional test of Seal, on May 19-21, 1880. Rev. per minute

467.34, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 525.76 feet per minute. No. of sample 21. No. of trials 5.

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Frictional test of Alexander Boyd & Sons Neatsfoot Oil, on May

22, 1880. Rev. per minute 526.15, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 591.92 feet per minute. No. of sample 22. No. of trials 4.

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Frictional test of Unknown [Mixed] Oil, on May 24, 1880. Rev.

per minute 490.46, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 571.77 feet per minute. No. of sample 23. No. trials 4.

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Frictional test of Unknown [Mixed] Oil, on May 24 and 25, 1880.

Rev. per minute 471.86, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 530.84 feet per minute. No. of sample 24.

. No. of trials 4.

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Frictional test of Unknown [Mixed] Oil, on May 25 and 26, 1880.

Rev. per minute 485.06, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 545.89 feet per minute. No. of sample 25. No. trials 4.

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Frictional test of Downer Oil Co., Champion Oil, on May 27, 1880.

Rev. per minute 508.69, 5 lbs. pressure per sq. inch. Velocity of rubbing surfaces 572.27 feet per minute. No. of sample 28. No. of trials 5.

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Fluidity Experiments. Valvoline Spindle Oil. Leonard & Ellis.

Sample 2.

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Downer Oil

Fluidity Experiments. 32° Extra Machinery Oil.

Co. Sample 8.

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Temperature.

Temperature.

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Seconds required
to empty pipette.

106.

88.5

Ellis. Sample 12. Fluidity Experiments.

Seconds required
to empty pipette.

93.50

Seconds reqnired
to empty pipette.

Swift. Sample I. Fluidity Experiments.

Temperature.

Temperature.

Temperature.

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130.

155.

125.50

115.5

Seconds required
to empty pipette.

Ellis. Sample 11. Fluidity Experiments. Valvoline White Spindle Oil. Leonard &

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Valvoline White Loom Oil.

Bleached Winter Sperm Oil.

Seconds required
to empty pipette.

229.

186.5

Seconds required
to empty pipette.

Seconds required
to cmpty pipette.

1

CO

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Temperature.

Temperature.

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