UNDULATORY MOVEMENTS AS AFFECTING OUR SENSES. 151 
subjected. According to this theory, the most general and complete develop- 
ment of the beard should be sought among the races which have been most favor- 
ably situated or the longest exposed to the conditions favorable to its production. 
Beardless races, in this sense, may be compared to children, and those that are 
bearded to adults. If the beard be a social mark, we seem to be authorized to 
affirm that bearded races are more nearly related to one another than to those 
that are beardless. 
He also refers as follows to the ‘‘ Essay on the Bible narrative of Creation,” 
by Prof. A. R. Grote, of Buffalo, N. Y.: ‘‘ Whatever opinion our readers may 
have as to the weight of authority quoted, or concerning Prof. Grote’s ability to 
guide us in this most intricate problem, no one will question his scientific attain- 
ments or his disposition to treat the subject fairly and his opponents kindly. The 
gist of the treatis is best given in the author’s own words.” If there is one sub- 
ject which now seems to me more important than another, it is the bearing of our 
recognition of the process of evolution upon the existing state of our religious 
creed. It is not that the teachings of Christ are to be rejected, or the morality 
of the Hebrew Bible to be condemned, but that we are to correct our views as to 
the way in which existing plants and animals (including man) came to be what 
they are to-day. For Astronomy and Geology the struggle is nearly over. Out 
of this struggle has sprung the fatal error of believing that our knowledge in these 
branches does not contradict Genesis, or that a reconciliation is possible. But 
with biology the struggle is now going on. It is imagined that the six days 
mean really periods, although from the context the meaning is shown to 
clearly agree with the words, since the morning and evening are given to limit 
the term and decide the intention. It cannot, indeed, be too often remembered 
that people did not write in early times what they did not mean. The study of 
Genesis, or the origin of things, religion must surrender to the sciences. 
JP leal SSIES, 
UNDULATORY MOVEMENTS AS AFFECTING OUR SENSES. 
PROF. T. BERRY SMITH, NORTHFIELD, MINN. 
Let us inquire into the nature of undulatory movement. 
You have all seen the waving of grain fields when the wind was sweeping 
across them. 
Did you ever think of the steps necessary for the production of the waves 
which you saw? 
Let us follow one head of wheat in its movements and find out what it does, 
Now it is standing still and erect. Ina moment the wind comes in a gust and 
