(°g63 
“fhall be rejected, or which fhall be found unfuccefsful, after a.tryal of 
-five years, fhall be burnt before the fociety, without breaking the feals. 
1. In cafe there fhould be a failure, in any year, of any communi- 
cation worthy of the propofed premium,. there will then be two premi- 
ums to be awarded in the next year. But no accumulation of premiums 
Shall entitle an author to more than one premium for < any one difcovery, 
invention or improvement. 
12. The premium fhall confift of an oval plate of folid ftandard gold, 
of the value of ten guineas, on one fide thereof fhail be neatly en- 
graved a fhort Latin motto, fuited to the occafion, ‘together with the 
words The premium of John Hyacinth De Magellan, of London, 
eftablithed in the year 1786. And on the other fide of the plate thall 
be engraved thefe words. Awarded by the A. P. S. for the 
difcovery of ———A. D. 
And the feal of the fociety fhall be annexed to the medal by a rib- 
bon pafling through a fmall hole at the upper end of the plate. 
The fallowing communications from candidates for the Magellanic annual 
premium, remain wreder confides-ation, ' 
1. An eflayon warming rooms. Afotto, Cuigue-eveniat femper prout 
meruit. Read May 20, 1791. 
The author propofes, as an addition tothe Franklinian fire-place, or 
open ftove, that the frefh air neceflary to feed the fire, be admitted 
from without, through tin pipes, placed under the floor, and rifing. up 
through the hearth at one fide of the ftove, where they communicate 
with iron pipes pafling thro’ the fire-as a grate. Thefe iron pipes again 
communicate with tin ones, extending up behind the wainfcot, nearly 
to the ceiling, where the air, now heated by pafling through -the fire, is 
fuffered toefcape intothe room. By this contrivance, the inconveni- 
ence arifing from the rufhing in of cold air from without, through every 
crevice and aperture where it can find a paflage, -will, itis alledged, be 
effeQually prevented, and the room keep warm with much lefs expence 
of fuel than in the common -way. : 
2. An attempt te prove that the generally received opinicn, that fteel 
{prings acquire an increafe of ftrength or power by cold weather, and 
lofe power by warm weather, is erroneous—Signature Scrupulous— 
Read November 4, 1791. 
The 
