55 
are collected in tanks 3, 4 and 5. The burning oil distillates are 
pumped to the large agitator where they undergo chemical treat- 
ment to render them fit for consumption. The crude naphtha is 
then redistilled in naphtha still No. 3, giving the various grades 
of gasolines and naphthas. The tar left after the first distillation 
is transferred to the tar still No. 6, where it is separated into light 
paraffine oil, heavy paraffine oil and still coke which remains in 
the still. The light distillate is used for fuel oil. The heavy oil is 
sent to the paraffine wax press house, where it is chilled and 
pressed to remove the paraffine oil, leaving the wax. The coke 
remaining in the still as a final residue is used for the manufac- 
ture of electric light and battery carbons. The reduced oil still is 
used for the production of lubricating oils. 
Above this model will be seen one of the original refinery, 
built in Cleveland, O., in 1863. 
The cases following show various finished products ready for 
sale, these being chiefly illuminating and lubricating oils with, 
however, a large variety of other useful articles. 
Cases 13 and 14. — Fifty-six varieties of high and low- 
priced burning oils, showing the standards of each required 
by the laws of different States. 
Case 15. — Cylinder oils of different grades. These are the 
heavier, more sluggish lubricating oils. 
Case 16. — Special grades of lubricating oils. These include 
spindle, sewing machine, screw cutting and engine oils. They 
are light bodied and quick feeding as compared with the cylinder 
oils. 
Case 17. — General lubricating oils, including miners’ oil, 
leather oil and various engine oils. 
Cases 18 and 19. — Bye-products of petroleum. These include 
paraffine wax, crude, semi-refined and refined, with illustrations 
of its uses for candles, matches, tapers, etc; axle grease, lantern 
oil, harness oil, “miners’ sunshine,” the safest material for hum- 
ing in miners’ lamps; vaseline products, such as cerates pom- 
ades, soaps and face paints. 
Case 20. — Special grades of illuminating oils. These oils are 
designed to give the best light obtainable under the laws of each 
State. They are liquids of remarkable purity and brilliancy, the 
two finest — Pratt’s Astral and Eocene — being hardly distinguish- 
able from distilled water in color. 
