MAGNETISM, THE LIEE OF THE WORLD—DEWAR. 63 
‘but the force is the same. It may exhibit itself in a hundred 
different ways, according to its condition, position, and materials 
under its influence. Sutticient attention is not often paid to the 
different conditions under which a force may either work easily 
or labour, according as they are favourable or the reverse. 
A man can draw a spark of electricity from another man’s 
nose, and some men after a brisk walk light the gas with their 
finger. We might, as a preliminary, argue that if a body is pos- 
sessed of magnetism, that body must be a magnet, and if a 
magnet, then the certainty is that the principles of magnetism 
guide and control that body. But a man is not like either a 
mineral or vegetable magnet. Heis a more compact body and 
in a—comparatively speaking—state of solution. 
The great and essential difference, however, between a plant 
and an animal is, that the former is stationary and has its food 
stippled to it, while the latter is migratory and seeks its food. 
The former is, comparatively speaking, hard and solid, while 
the latter is pHable and soft. The former is connected with one 
huge feeding ground and galvanic battery, from which it draws 
supplies beth of food and magnetic force, while the animal is cut 
off from this supply, and must consequently be endowed with an 
apparatus which will answer the same purpose, and which it can 
earry about with it. This apparatus is the stomach, the galvanic 
battery of the ‘enimal, where life is originated and sustained. 
The Electric Telegraph supplies us with a grand illustration of 
the nature and working of this animal battery. In the battery 
of this apparatus we see two metals, zine and copper, dissolving 
in diluted sulphuric acid, and the action produces a force pos- 
sessed of enormous capabilities, which are only beginning to be 
known. 
In the stomach of man, or other animal, a similar dissolving 
process is continually going on with the food put into it, and the 
force thereby developed causes and keeps up the circulation of 
the blood and the whele life action of the body, enabling it to 
meve wherever it desires, and to perform all kinds of exercise 
and locomotion. 
Nor does the resemblance end here, for there is a wonderful 
