HUMAN AND BEUTE INTELLIGENCE. 
147 
rounding external world. The higher intelligence these conditions 
require for successful fulfilment the longer will the young require 
care. This deduction supported by reference to facts. Information 
handed down from one generation to another. Influence of sym- 
pathy of action leading animals to sociality. Migratory animals, 
otherwise living solitarily, congregate before starting on their 
journeys; thus probably handing down knowledge of the route 
from generation to generation. The five senses very similar in the 
human species and the brutes. An equal degree of similarity exists 
between their intelKgence in respect to these senses. 
Actions frequently repeated produce a co-ordination of the ner- 
vous and muscular systems ; so that actions are performed under 
certain circumstances almost without the interference of the intel- 
ligence. This co-ordination capable of inheritance, and hence pro- 
bably the explanation of apparently inherited mental character- 
istics. 
Man's organization — probably the perfection of hand and brain — 
enables him to make and use tools, and so to vary his pursuits 
individually — a condition not attained by other animals. 
Man enabled by spoken and written language to enlarge his 
experience, and hand down advancement in a manner quite beyond 
the attainments of the lower animals ; and thus man alone, having 
variety of pursuit within his power, and having advancement and 
improvement beyond his own immediate experience placed within 
his reach by spoken and written language, is thrown under con- 
ditions for developing his intelligence to the reflective stage not 
possessed by the brutes. 
