. Journal. mall bore, and in the mode of heating. As yousee, it consists of an outer vessel which holds the waterrequired to heat the inner oil chamber. This water is heatedby a separate boiler working on the circulatory systemplaced at one side of the apparatus. I may say in passingthat I have found this mode of heating very satisfactory,and in passing I may remark that it would be worth whileadopting it in all cases where it is required to heat and keepat a high temperature water - baths and water - jackets,especially where it is not possible to apply a Bunsen burnerdirect to the water-jacke
. Journal. mall bore, and in the mode of heating. As yousee, it consists of an outer vessel which holds the waterrequired to heat the inner oil chamber. This water is heatedby a separate boiler working on the circulatory systemplaced at one side of the apparatus. I may say in passingthat I have found this mode of heating very satisfactory,and in passing I may remark that it would be worth whileadopting it in all cases where it is required to heat and keepat a high temperature water - baths and water - jackets,especially where it is not possible to apply a Bunsen burnerdirect to the water-jacket. The inner vessel is the oil vessel. From the bottom ofthis passes a short tube with a narrow bore, the entrance towhich is closed by a valve. By raising or lowering of thisvalve the oil may be allowed to run or be stopped as may berequired. A gauge pin to regulate the amount of oil placedin the oil chamber, with arrangements to support thermo-meters in the oil and the water-jacket, complete The instrument is not put forward as a standard instru-ment, but readings of several such apparatus have beenfound to give concordant results, so that it might fairly bequoted as a standard. At all events, any instruments sentnut will be so made as give concordant readings. The apparatus is an inexpensive one, and possesses manyadvantages over the viscometers which are in general use byoil dealers. The following table embodies some readings made with thenew instrument, which will serve to show its range andcapacity:— Table of Viscosities oe Oils. Temperature—Fahrenheit. Castor oil Thickened rape nil Sperm oil Colza oil Whale oil Tallow oil Cotton oil American 8-35 oil American 905 oil American 915 oil Scotch 865 oil Scotoh 88a oil Scotch 890 oil Russian 900 oil Russian Jill nil Rosin oil, dark Rosin oil, pale Cylinder oil, Cylinder oil, pale. Cylinder oil, dark 1,248 1,37(1 68-5131128-7105100 68113 lto 32558-571-5 202-5 462 152-5 130 Ti 4S7-5331-5 36-4 50 61 6
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
