BULLETIN 
OF THE 
MATHEMATICAL SECTION. 
16TH Meretine. JANUARY 7, 1885. 
The Chairman, Prof. AsApH HALL, presided. 
Nineteen members and guests present. 
Election of officers of the Section for the year 1885 was then 
held and resulted in the selection of Mr. G. W. Hrvx as Chairman 
and Mr. Marcus BAKer as Secretary. 
Mr. E. B. Exxiorr then presented a communication entitled 
EXAMPLE ILLUSTRATING THE USE OF A CERTAIN SYMBOL IN THE 
CALCULUS OF AFFECTED QUANTITY. 
The example selected was a demonstration of the Pythagorean 
Theorem by the aid of a new symbol. 
Mr. Marcus Baker presented a communication entitled 
A COLLECTION OF FORMULZ FOR THE AREA OF A PLANE 
TRIANGLE, 
which elicited some criticism of details and of notation. 
[This paper is published in full in the Annals of Mathematics, 
vol. 1, No. 6, and vol. 2, No. 1.] 
Mr. W. C. Wintock (by permission of Rear Admiral S. R. 
Franklin, Superintendent U. S. Naval Observatory) presented a 
communication on 
PHYSICAL OBSERVATIONS OF WOLF’S COMET (1884 III). 
[Abstract. ] 
The first observation of Wolf’s comet that I obtained was with 
the transit circle of the U. 8. Naval Observatory on September 24, 
37 
