Transcript of Notes on pressure
~ A treatise on pressure ~
During my many adventures, I've had occasion to notice the effect of mass upon a compressible fluid or solid. In some planes, for instance, differences in gravity may affect one's weight, but relative pressure remains constant, as the fluid or solid being measured is affected in the same way.
With these experiences I've deduced that, just as weight can be measured, pressure can be recorded as a reflection of mass.
In the first instance, my unit of measurement is quite arbitrary, but suits my needs. The pressure applied to a cubic yard of air by the heat of a typical dragon's flame I have dubbed as 1 dragflam (D) and broken that down into 1,000 tickits (t).
Of course, it is difficult to coerce a person into a container to be scorched by a dragon, and the only practical purpose I can thus far determine is to measure vertical pressure that is, the pressure afforded from a combination of mass and gravity.
Therefore, a small amount of weight, say that produced by a human body carrying seventeen units of coal produces around thirty-eight tickits (38t) of vertical pressure.
These are sensible assumptions to make regarding pressure, at least until a universally agreed scale of measurement exists.
Other standard vertical pressures include:
mithril crossbow - 5t
fire battlestaff 2t.