Journal . ition andsecured by rotating the lid slightly counter-clock-wise until its three lugs re-engage in their pin at M is next replaced and the lid andstirrer are thus firmly secured in position, thestirrer is then connected \vith the pulley by thesliding sleeve on the stirrer, which sUps over thepulley shaft and is driven by it by two pins on theshaft engaging with two slots cut in the sleeve. Everything being now ready for carrying outthe agitation of the oil and water, the electricmotor, which is visible in Fig. 2 only, is startedby means of a starting switch and speed regulat
Journal . ition andsecured by rotating the lid slightly counter-clock-wise until its three lugs re-engage in their pin at M is next replaced and the lid andstirrer are thus firmly secured in position, thestirrer is then connected \vith the pulley by thesliding sleeve on the stirrer, which sUps over thepulley shaft and is driven by it by two pins on theshaft engaging with two slots cut in the sleeve. Everything being now ready for carrying outthe agitation of the oil and water, the electricmotor, which is visible in Fig. 2 only, is startedby means of a starting switch and speed regulator,which is on the base of the support carrying themotor {inde Fig. 2). The speed at which the stirrer runs can bemodified by means of the speed regulator speed of the pulley should be kept at about350 to 400 revolutions per minute. After stirringthe mixture of oil and water at this speed for fiveminutes the mixture is run off from the tester intoa previously warmed 1000 graduated glass jar. FlQ. 2. variations in the results obtained, but if too low ortoo high a speed is employed the apparatus doesnot yield satisfactory results. Discussion. The CiiAiKiiAN thought that the presence of someIjasic nitrogenous compound might assist in theemulsification process. ^^Tiat was called bitumenwas not a definite chemical compound, andnearly always contained some nitrogen. He under-stood that fatty oils emulsified rather more \lV.,] PHILtP—DEMULSIFICATION VALVES OF MINERAL LUBRICATING OILS. 701 readily if they were mixed with other oils: this iiUKlt possiMv l>e due to liydrolysis. Mr. D. A. SiTHKUi-ANn tliKURlit Mr. Philiphad not (|viite liit upon the i-ausi> of tlie cmulsifica-tion in ns-suiuing it to ho bitinnon, and tliatit wius niorf hkoly tho sulphur compounds in (hooils \isod. ICnuilsifioatiou could he readily causedby over-treatment with s\dplunii- aeiil. of .Scottishshale oils wliicli contained oleline liodies and otherunsaturated hydrocarlions,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
