7" i “al 
B54 
Go thou to bliss! Yet, tho’ no smile of thine, 
The Muse that smile once cherish’d may 
; obtain, 
Fondly she hangs her tribute on thy shrine, 
She mourns thee, Cavan, tho’ she mourns 
in vain! 
Lo! Penury gazes wildly on the bed, 
. Where even now is laid ber earthly trust, 
Ask'st thou why lower droops the sutierer’s 
; head? 
“This day was Cavan’s form consign’d to 
dust! 
* 4 f Bra) ° 
Proceedings of Learned Societies. 
[May 1, 
Friendship—but Friendship mutely. turns 
aside, 7 
She speaks not, yet the pitying Muse can 
guess : . 
That secret the tenacious heart would hide, 
Of cherisi’d woe’s unsocial bitterness. 
That thou-werr great, what boots it to reveal? 
The grave has seiz’d thy transient dignity ; 
~That thou wert good, may God’s high sanction 
seal, 
And stamp thy rank to all eternity} 
March 2, 1811. : , 
‘ 
PROCEEDINGS. OF LEARNED SOCIETIES, 
-REPO RT ofr tHe NATIONAL IN- 
STITUTE of FRANCE, ror 1810. 
EW years have heen so fertile as the 
last, in various and important re- 
searches, in the different branches of 
science ; from (he more general divisions 
of philosophy, to the particular history 
of the species of the animal, vegetable, 
or mineral, kingdoms, the labours of the 
members, and of others which have been 
submitted to this class, have added 
new treasures tu the stores of know- 
ledge. 
Heat.—The sudden production of 
heat, man ‘infinite variety of chemical 
phenomena, although more known than 
those of light, requires to be determined 
with yreatér precision. M. Sage has 
given the result of his researches on the 
degrees of heat, which concentrated mi- 
neral acids produce, in combining with 
metallic oxids, earths, and water. Sul- 
phuric acid at 67 degrees of theareometer 
of Beaumé, mixed: with a third part of 
water gave a temperature of 6O devrees; 
atric acid of 45 degrees vave 45 degrees ; 
and muriatic acid of 20 devrees gave, 
‘with the same qnantity of water as in the 
preceding experiments, 22 devrees. 
The greatest degree of heat obtained 
with the sulphuric acid, is that which 
results from a mixture of this acid with 
calcined bones, which was 160 degrees 
above zero. In general these experi- 
mepts jead us to presume, that the heat 
produced by the combination of bodies 
Js proportional to their contraction. 
Tt isto be regretted that M. Sage had 
not determined the specitic weight of the 
bodies he cumbined, both before and 
‘after the experiment. 
_ The absolute measure of heat in high 
degrees of temperature, for which liquid 
substances can not be enployed, has 
.always engaged the attention of philu- 
sophers, 
ae 
M. de Morveau, who has been en- 
gaged in experiments on this subject for 
several years, Las communicated a con- 
tinuation of the tables mentioned in our 
report of 1808. The’ first of these pre- 
sents the degrees of heat, of fusion, and of 
evaporation, in different bodies, coirected 
and arranged with the most approved py= 
rometrical and thermometrical scales. A 
second tabie gives the dilation of metals, 
determined according to the same scales ; 
in the third he indicates the relation be- 
tween the éxpansion and fusibility of 
metals, In the fourth he gives the de- 
grees of heat indicated by his pyrometer 
of -platina, and their agreement with 
that of Wedgwood from observations of 
fusion in the highest temperatures. 
Thesé tables are accompanied with de- 
tails of the processes employed by the 
author to correct his calculations, which 
differ essentially from those given by 
Wedgwood. This difference is chiefly 
occasioned by an error which that philo- 
sopher committed in measuring the fu- 
sibility of silvery and making it the basis 
of his calgulations.* P 
Light —The class of natural philoso- 
phy and chemistry had proposed a prize 
for the examination of the circumstances 
and causes which occasion phosphores- 
cence. 
M, Dessaignes, principal of the col- 
lege of Vendome, has continued his ex- 
periments on these subjects, in order to 
ascertain the phenomena attending |u- 
minous appearances; whether spontae 
neous, by friction or by gentle warnith, 
* Dr. Davy, in his lectures this year at the 
Royal Institution, stated, that the pyrometer 
of Mr. Wedgwood was discovered to be an 
imperfect measure of Heat. If kept for a 
long time in a lowertemperature, it contracts 
as much as when exposed for a shorter time 
tu a wore intease degree of heat, + 
and. 
