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.

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.

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.

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.

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.

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.

Fluidity Experiments. Valvoline Spindle Oil. Leonard & Ellis.

Sample 2.

Seconds required
to empty pipette.

288

Fluidity Experiments.

Lard Oil. John P. Squire. Sample 3.

Seconds required
to empty pipette.

Fluidity Experiments. 32° Extra Machinery Oil.

Co. Sample 8.

Downer Oil

Seconds required
to empty pipette.

345.

Temperature.

Fluidity Experiments. Valvoline White Spindle Oil. Leonard &

Ellis. Sample 11.

Temperature.

Seconds required
to empty pipette.

353.

284.

Temperature.

Seconds required

to empty pipette.

Temperature.

Seconds required

to empty pipette.

00

со

334.

Temperature.

Seconds required

to empty pipette.