INDEX. 
Observations of a Aquarii, 7 
« Pegasi, } 
a Andromedse, 
Polaris, 
(3 Ursae, 
- — y Draconis, 
P 
Perpendicularity , expressed by 
Piazzi , Af. his observations of prm 
Plumb-line , observations on the methods of employing, 428 
Pond, John, Esq. On the declinations of some of the prin- 
cipal fixed stars ; with a description of an astronomical 
circle, and some remarks on the construction of circular 
instruments, ----- 420 
Potatoes, early made to blossom, - - 297 
tubers formed from descending sap, - 299 
made to form on branches above ground, ib. 
Prostate gland, a small lobe newly discovered, - 195 
Q 
Quadrants , not likely again to be substituted for circles, 423 
Quantities . imaginary, - 23 
, impossible, not necessary for summation of certain 
series, ------ 1 4 7 
R 
Radicles and germen, on the direction of their growth, - 99 
Robertson, Rev. Abram. New demonstration of the bino- 
mial theorem, ----- 305 
Robertson, Mr. James. Observations on the permanency 
of the variation of the compass at Jamaica, - 34 8 
S 
Saturn , its figure, atmosphere, and ring, - - 455 
• proportion of its diameters, - - 456 
figure not seen but by a distinct power of 50 0, 458 
subject to periodical changes of colour, - 464 
Seeds , made to grow revolving, - - - 102 
Series , summed by a method of differences, - - 147 
Page 
446 
447 
448 , 449 
450 
452 
1 , - - 28 
ipal fixed stars, 453 , 454 
