Energy content of biofuel (J/kg) or equivalent units. Energy density is the amount of energy stored in a fuel per unit volume, expressed in SI units as joule per litre (J/L) or equivalent units. The table below includes entries for popular substances already used for their energy, or being discussed for such use. The second column shows specific energy, the energy content in megajoules per unit of mass in kilograms, useful in understanding the energy that can be extracted from the fuel. The third column in the table lists energy density, the energy content per liter of volume, which is useful for understanding the
Insanity in Ancient and Modern Life which his work was received. His books, including the Insanity in Ancient and Modern life, are often cited and referred to in scientific literature about sociocultural causes and influential factors contributing to insanity in the past and present. Additionally, he is often minorly mentioned in historical books about the emergence of psychology as a discipline. Tuke was among the first persons to recognize an increase in the prevalence of insanity by making use of statistics to identify possible causes, which he clarifies in great detail in "Insanity in Ancient and Modern Life." As many of his other books, the book