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Another "system" that has acquired no little celebrity, and which has for its aim the reduction as far as possible of alimentary hydrocarbons while permitting a certain proportion of fat, is that, of Denneth, which necessarily follows somewhat closely the lines laid down by Ebstein.
A physiological regimen comprising four to five ounces of nitrogenous principles as derived from eight to ten ounces animal muscle and albuminates; three to six ounces of fat; eight to ten ounces of hydrocarbons as yielded by ten to twelve ounces of sugar or starch food.
After giving an account of our knowledge of rosin spirit, the author described the result of the examination of the mixture of hydrocarbons remaining after heating it with sulphuric acid and diluting with half its volume of water and steam distilling.
So with the long list of hydrocarbons gaseous, liquid, and solid called paraffins, that are obtained from petroleum and that are all composed of hydrogen and carbon, but with a different number of atoms of each, like a different number of a's or b's or c's in a word. What an enormous number of bodies Nature forms out of oxygen by uniting it chemically with other primary elements!
We may believe, then, that the three great classes of aliment yield fat, in some degree; that alimentary fat may be fixed in the tissues; and that hydrocarbons favor the deposition of adipose either directly or indirectly.
He suggests that first the fats and hydrocarbons be reduced as little as possible; that a moderate mixed regimen is required, containing a preponderance of albumen, small quantities of hydrocarbons and gelatinous matters, with but very little fat.
Exactly the same thing holds of special and general education of the mind. A monotonously uniform exercise may by practice give great skill in one special act; but the skill is limited to that act, be it bookkeeping or calculations in logarithms or experiments in hydrocarbons.
Before long, the complex hydrocarbons and cellulose would all be innocent little molecules of carbon, oxygen, hydrogen; they might turn up in new combinations as sugar on the table! The Mentorian grumbled, "You young people think the rules mean everybody but you," and strapped him far too tightly into the bunk.
"Because, to one who isn't interested, it is an extremely dull subject. However, it is better that you should know as you don't seem to have learnt it at school. Here goes: marsh gas, or methane as it is sometimes called, is the first of the group of hydrocarbons known as paraffins. Whether that conveys anything to you I don't know. But you've asked for knowledge and I mean you to have it."
Be sure all the ash is out of the turpentine portion; now, after distilling the turpentine off, act on the residue with all the solvents that were used on the residue, using for the first the solvent which is least likely to dissolve a great part of it. By thus manipulating the various solvents you will be enabled probably to separate the crude asphalt into several distinct hydrocarbons.
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