Mr. Brown on the unimpregnated Ovulum. 409 
1 + cosa = 19910°2 ... log. 4°29907 
cosa —cosb = 210°3 ... log. 2°32288 
ee 
6°62195 
cos 2 — cos (x + y) «. log. 2°59481 
10645 ... log. 4°02714 
cos a@ 4384 
51° 14 .,. cos 6261 
63 414 
2)114 554 
57 272 = latitude. 
2)12 273 
6 132 = declination. 
This declination answers to March 4th, or October the 9th. 
In using formula («), particular attention must be paid to the 
signs of the quantities. Iam not aware that there is any other 
difficulty attending the use of it. 
I remain, sir, your obedient servant, 
Gloucester Place, Hackney Road, James Burns. 
March 23, 1826. 
LXI. Character and Description of Kingia, a new Genus of 
Plants found on the South-west Coast of New Holland : with 
Observations on the Structure of its Unimpregnated Ovulum ; 
and on the female Flower of Cycadee and Conifere. By 
Rosert Brown, Lsg., RS S.L.G E., ELS. 
(Concluded from p. 361.] 
(THE account which I have given of the structure of the ve- 
getable ovulum, differs essentially from all those now 
quoted, and I am not acquainted with any other observations 
of importance respecting it. 
Of the authors referred to, it may be remarked, that those 
who have most particularly attended to the ovulum externally, 
have not always examined it at a sufficiently early period, and 
have confined themselves to its surface: that those who have 
most minutely examined its internal structure, have trusted 
too much to sections merely, and have neglected its appear- 
ance externally: and that those who have not at all examined 
it in the early stage, have given the most correct account of 
its surface. ‘This account was founded on a very limited ob- 
servation of ripe seeds, generalized and extended to the unim- 
ete ovulum, in connexion with an hypothesis then very 
ol, 67. No. 338. June 1826. 3K commonly 
