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. 124.25 151.75 185.50 Temperature. Seconds required 288 Temperature. Fluidity Experiments. 150. 242.5 172. 285. 203.5 345. Seconds required Fluidity Experiments. 32° Extra Machinery Oil. Co. Sample 8. Downer Oil 230. 290. 345. Seconds required to empty pipette. Seconds required to empty pipette. Ellis. Sample 11. Fluidity Experiments. Valvoline White Spindle Oil. Leonard & Seconds required 150 93.50 125.50 186.5 140 106. 150.5 229. Fluidity Experiments. Valvoline White Loom Oil. Leonard & Temperature. Seconds required Temperature. Seconds required 284. 353. |