890 PROCEEDINGS OP THE AMERICAN ACADEMY 



Berlin Jahrbuch. To reduce to either of these authorities, the variation 

 of the dedination (8d) must be multiplied into 1.02. When all terras 

 are taken into account, the latitude is 



X = 42° 42' 20" + 16".56 + 1".0 + 1.02 8d± 0".1599, 

 from which for use, 



i = 42° 42' 37".56 ' or, 42° : 42' : 37".6 ; 



The value of one division of the level is 0".972 ± ".033. 



Five buudred and forty-fifth Meeting. 



January 25, 1865. — Statute Meeting. 



The President in the chair. 



The President called the attention of the Academy to the 

 recent decease of two of its members, — Hon. Edward Ev- 

 erett and Mr. W. P. G. Bartlett, of the Eesident Fellows. 



Professor Henry D. Kogers, of Glasgow, was elected an 

 Associate Fellow in Class H. Section 1. 



Mr. Frederick W. Putnam, of Salem, was elected a Resi- 

 dent Fellow in Class H. Section 3. 



Five bundred and forty-sixth. Meeting. 



February 14, 1865. — Monthly Meeting. 



The President in the chair. 



The President called the attention of the Academy to the 

 recent decease of Capt. J. M. Gilliss, an Associate Fellow, and 

 the Director of the National Observatory at Washington. 



Mr. Ferrel made the following communication : — 



" It was shown in a note read on a former occasion, tliat if the tidal 

 wave of the ocean is on an average two feet high and displaced two 

 degrees by friction, the elfect of the moon's attraction on the tidal wave 

 must cause an inci'ease of y^^ of a second in the length of the day in 

 2,500 years. From this we may readily determine that the earth's 



