Pro ceedings 1 9 3 



afternoon. 



The brain cells are repaired during sleep. But it is important to- 

 note that in any one night there cannot be complete recuperation. 

 Thirty-six hours are required for the cells to become normal after 

 fatigue. That is, the physiological no less than the religious Sabbath 

 extends from Saturday evening to Monday morning. Sabbath breakers 

 are less moral, less intellectual than they would be if they observed 

 the Sabbath. They shorten their lives by Sabbath desecration: 

 while they live they crowd the offices of specialists in nervous 

 diseases. 



The following persons were elected to membership, sub- 

 ject to the rules of the Academy: — Rev. John Grueiner, St. 

 Paul; Harlow Gale, and Geo. C. Christian, ^Minneapolis. 



The secretary read an invitation from Josephine D. Peary, 

 inviting the ^linnesota Academy of Natural Sciences to send 

 a naturalist on the Greenland Scientific Expedition of 1895, 

 which expedition is being fitted out for the purpose of bring- 

 ing home Mr. Peary and his assistants from northwestern 

 Greenland wdiere they are at present engaged in scientific ob- 

 servations, particularly in Meteorology. The secretary was 

 directed to express the interest of the Academy in the enter- 

 prise and its regrets that circumstances would not permit par- 

 ticipating in the expedition. 



The secretary announced the mounting of the group of 

 Orangs by the Ward Natural History Establishment in Roch- 

 ester, N. Y., and that this group would soon be shipped to 

 Minneapolis. 



225th Meeting, May 7, 1895. 



Fifteen persons present ; President Osbo^n in the chair. 



The St. Paul Academy of Science was again the guest of 

 the Academy, pursuant to invitations extended. 



The following program was presented : 



An Observation of Ants, by O. W. Oestlund. 



Remarks on Some Birds Nev/ to ^Minnesota, by Dr. T. S. 

 Roberts. 



An Amine compound of gold, by H. B. Hovland. 



The Chemical characters of the Alinnesota sandstones, by 

 Chas P. Berkey. 



A review of known facts of the Chemistry of local Sand- 

 stones. 



