.815,} Scientific Intelligence. qi 
and to be delivered to the Secretary on or before the Ist of Decem- 
ber of the succeeding year to that in which the subjects are pro- 
posed ; and the adjudication of the prize will take place in the last 
week of February following. 
To each dissertation shall be prefixed a motto; and this motto is 
to be written on the outside of a sealed packet, containing the name 
and address of the author. No dissertation will be received with 
the author’s name affixed ; and all dissertations, except the suecess- 
ful one, will be returned, if desired, with the sealed packet un- 
opened. 
Il. Native Boracie Acid. 
Mr. Smithson Tennant first observed native boracic acid attached 
to some specimens from Lipari. Dr. Holland afterwards visited this 
place, and found boracic acid in large quantity within the crater of 
Volcano, forming a white feathery covering to the sulphur, which 
is deposited from sublimation in various parts of this great cavity.— 
(See Holland’s Travels in Greece, p. 9.) 
III. Climate of Athens. 
It appears from a note in Dr. Holland’s Travels, p. 411, that at 
Athens the thermometer sometimes rises in summer to 104°, and 
that in winter it falls as low as 28°. In July the thermometer is 
frequently above 90°. ‘The average quantity of rain that falls is 
stated at only 21 or 22 inches; I presume French, as the observer, 
M. Fauvel, was a Frenchman. 
IV. Table of Passengers, Waggons, Sec, that cross London Bridge 
and Blackfriars Bridge in one Day. 
The day chosen by the Directors of the Southwark bridge was in 
July, 1811. A rate is fixed for the purpose of showing the pro- 
prietors of the Southwark bridge the probable quantity of money 
that may be raised on that new. bridge :— 
Rate, | London Bridge. | Blackfriars Br. 
d. Zz. s. d 3. fp 
Foot passengers ...scccevesceesseees 1 |89,640)373 10 0} 61,069)254 8 4 
Waggons ...........- vaetaseeracses| 1 co 769} 25.12 S| 533) 1715 4 
Carts and drays.........- ma erie aes A | 2,924) 48 14 8 1,502} 25 O 8 
Coaches......ccsecessccocvcvcecsses} 6 | 1,240] 31 0.0) 99y).24.15 0 
Gigs and taxed carts .....0.-se0e00e+] 4 485) 8 1 8 500} 8 6 8 
MERE Ds Five ccedsccecadvaetebiochst) (ld TH AER \G) -822).5 2.9 
491 14 6 335, 38, 9 
Deduct half the amount of waggons, &c, for return| 59 2 3 4010 8 
432 12 3 294 18 6 
The transit over Blackfriars bridge is nearly double what it was 
six years before the above account was taken, 
