The Four Forces in Nature . 
643 
1880.] 
Great men never have a numerous progeny. This is ac- 
counted for by the fadt that the greater the mental power, 
and the more it is used, the more blood is required to renew 
the tissues of the brain ; consequently the generative appa- 
ratus suffers. On the other hand, low brain power and 
physical exertion determines the blood to the lower parts of 
the body, and increases the sexual desires. This is the 
reason why ignorant and low forms of human beings have a 
greater progeny, and bring them into the world with less 
pain and trouble than the more cultivated. 
When, in the highest form of animal, mensic viva was 
sufficiently well developed, and the animal became respon- 
sible for his actions to the Great Creator (it was thus that 
man discovered his nakedness), then he acquired the power 
of transmitting the fourth force (mensic viva) to his off- 
springs. , , t r 
In the same way the animal or plant has the power ot 
transmitting, to a full-developed offspring, organic and 
animal viva without mensic, or organic without animal and 
mensic viva. , , . , . , Al _ 
The missing link between the highest animal and the 
lowest man need not be looked for in his physical appear- 
ance, such as the wearing away of the tail of the monkey, 
but in the transition from animal to mensic viva. Will is 
common both to man and the higher forms of animals, and 
is possessed by those animals whose sensitiveness is con- 
centrated, and forms what is called the brain. Will serves 
as a connedting-link between man and animals. 
When man’s sexual passions are excited, heat is developed 
at the back of the head (cerebellum) ; when man’s virtuous 
passions are excited, heat is developed at the crown of the 
head ; when man’s reasoning and thinking faculties are 
excited, heat is developed at the forehead. 
When we think heat is produced we use up a portion of 
the substance of the brain ; and there can be no heat and 
no waste of the brain without work, and there can be no 
work without motion. 
Mensic viva is therefore a mode of motion. 
Errata. 
Page 381, line 10, for “ lightning” read “ lighting.” . 
Page 383, last line, for “ would require ” read “ would not require. 
Page 3QO, line 5, for “ proportions ” read “ propulsion.” _ 
Page 556, line 5 from bottom, for “ motion ” read “ motive. 
