160 Miscalbasits: f 
For the convenience of computers, the local times above given have 
been reduced to their corresponding value for the State House by E. O. 
Kendall, by means of his formule, in Vol. xx, of the Journal of the 
Franklin Institute, p. 125, which gives the following values for the vari- 
ation of the local times of the several phases, for a small variation of ter- 
___ restrial latitude or longitude, as follows :— 
oy 
a ss! 
a ~ = es: a ws 
— 
- ton its proper weight, in mean time of the State House, are, 
be 
* 
i 
= oF 
- 
et 
eo for + or north 1” terr. Jat. ——0. 0397 0. 0382 =, 0343 
~ Do. +-or west Ls. of terr. lon. in time=—1} 2600 — 1.1400 — 0.9925 
_ The means of his results for the State House, giving to each observa- 
a. Un. s 
Beginning, 3 13 10.06 
Formation of ring, 4 31 18.76 
Rupture of ring, 4 35 31.35 
End, . 5 45 15.46 
Duration er eclipse, : : ia 3 2 32 5.40 
Duration of ring, =. : VES, 4 12.59 
Mr. Du Ponceau presented a communication, entitled “ A Vocabulary 
of the Language of the Valiente Indians, who inhabit the State of Costa 
Rica, in Central America, by Col. D. Juan Galindo, of Guatemala.” 
Referred to the Historical and Literary Committee. 
Mr. Nulty read a mathematical paper, entitled “‘ New Formule relative 
to Comets, by E. Nulty, of Philadelphia.” Referred to Dr. Patterson, 
Mr. Walker, and Capt. Talcott. 
The subject of this paper was the component velocities of a comet, ob- 
served at three consecutive and moderately small intervals of time. Ina 
preliminary notice of his subject and the means employed in its devel 
opment, the author mentioned some advantages which he conceived to be 
attached to his peculiar mode of investigation. He alluded to different 
results already known, and, with several novel and general formulz com- 
prised in his paper, he announced two new sets of expressions which he 
represented as being directly applicable to the exceptive cases, In which 
particular Sidtradiicas render the forms hitherto given, doubtful or inde- 
terminate. He also noticed a numerical application which he made 0 
his formule and of others connected with the method of Laplace, to the 
data of the comet of 1803; and he intimated that a pence of the 
results obtained by him in that and other instances, h ad led him to some 
remarks, which he inserted towards the close he his per, oe his age 
ion of their analytical and practical ‘imp 
Dr. Patterson read a paper by Professor 
University of Virginia, containing “ vad ote 
iene 
