The Bridgeport evening farmer., 1917-04-27
HOW TO HANDLE 7 "CAS' AT HOME
fBy Charles B. Worthington, WelIes-
 H lev Hills. Mass. Copyright. 1915.

tBy Charles E. Worthington, Welies- @ ley Hills, Mass. Copyright, 1915, # by The Safety Press, Inc. N. Y.)
 zs Gasoline has two uses in the house hold, as d solvent of grease and oils for cleansing purposes and as a source of heat for cooking, or more rarely for light.
 As a solvent of grease it is not like " that any popular substitute will be found, not that it is the most effective or the safeet, but that it is by far the most easily procurable and at the low est cost. ,Carbon-tetrachlorid is ev- en a better solvent. but it's cost, like that of several other compounds of similar nature, is generally prohibit tive and it is not readily procurable. Chloroform is likewise costly and pos sesses other objectionable features for general use. While most other hy- dfo-carbon solvents are even more hazardqus than gasoline so far as fire hazard Is concerned, and possess dis Agreeable qualities in addition. It is quite safe to assume therefore that gasoline has come to stay, at least as long as present conditions last,
 Gasoline is one of the lighter pro- ducts of petroleum obtained by dis tillfng that substance in heated stills and condensing the resulting vapors. There are several methods followed in this procedure but the general prin- cip1e is the same in all.
 1s When we begin to consider these products in detail, we are met at once ] by a confusion of names, every coun- %v~xy r,A ov1xy ifxy ing in that respect, the situation being further confused by the 1multitude of ! trade names which convey no real i intimation of the exact nature/o of the article. Some allowance must be made for this condition in generalizing on this subject in nontechnical discus sion like this paper.
 The first and Ightest product of this distillation is known as Rhigolene, Cymogene, Keroselene, Petroleumeth- CT, etc, etc. This much named sub stance has specific gravity of .62 and boils (according to various au- thorities) at temperatures between 65 degrees and 113 degrees Fahrenheit. 1t evaporates almost instantaneously on exposure to air, rapidly enough to sometimes freeze the surface to which it is applied leading to it's use to some extent in surgery to produce local in- sensibility.
 As might be inferred, this substance 1 is too dangerous to be commercially available to any great extent / The next to come over is (techni- cally) Gasoline, specific gravity .66, 1! average boiling point about 122 de- , grees Fahrenheit. Then follows a se- i ries of naphthas ranging in specific gravity from TO to "A with boiling point averaging somewhere about 190 degrees F. Lower than this the pro- : duct is Illuminating oil (Kerosene) with an approximate specific gravity of 80 and boiling point higher than 200 degrees F.
 All of the above, which are lighter than kerosene are properly volatile naphthas. Similar naphtha derived from the distillation of coal tar is properly benzine, though deodorized ! (not very much deodorized) naphtha is sometimes sold under that name. and the slightly differing naphthas from other substances have names of their own. Commercially, however, only those from petroleum or coal tar are usually encountered Coal oil obtained by dtstillation of bituminous shales (cannel coa) has practically