PHILOSOPHICAL SOCIETy OF WASHINGTON. 31 



Whence, performing the integrations and restoring the value of h, 

 we have 



Dr. B. F. Craig read a paper 



ON THE FLUCTUATIONS OF THE TEMPERATURE OF THE HUMAN BODY. 



( This paper is published under the title, " Variations in the Temperature of 



the Human Body," in the American Journal of Science and Arts 



(3), vol. a., pp. 330-332, Nov. 1871.) 



Mr. E. B. Elliott presented an essay 



ON THE NEW COINAGE OF JAPAN. 



Mr. J. E. Hilgard read an essay 



ON AN EXPONENTIAL FORMULA HAVING REFERENCE TO THE TOLE- 

 RANCE ALLOWED AT THE U. S. MINT. 



13th Meeting. October 21, 18tl. 



The President in the Chair. 

 Prof. Benj. Pierce read a paper 



ON THE heat OF THE SUN. 



The author stated that he desired to offer evidence confirmatory 

 of Mr. Lane's views as to the gaseous constitution of the sun, 

 holding that the outer limit was fixed by laws of heat. 



Prof W. Harkness made a communication 



ON THE physical CONSTITUTION OP THE CORONA OF THE SUN. 



{This paper is published in Washington Astronomical Observations, 1869, 

 Appendix I., pp. 82-89.) 



Prof Joseph Henry made a communication 



ON OBSERVATIONS MADE ON A JOURNEY TO CALIFORNIA ; 



