164 
the imperfection is too fmall to produce 
this effect, I will requeft him to affign 
any reafonable limit to its magnitude, 
_ and, by producing the note long enovgh, 
I will thew that a beat muft. neceffarily 
enfue. Perhaps a wilh to retain the New- 
tonian theory of the law of the undula- 
tions may have led him into thefe fuper- 
fluous refinements.”"—-See the article 
LEARNED SOCIETIES, p. 354, 
'.. Mr. E, Waker has juit publifhed a 
Table, by which the variation of rate in 
a Time-piece, as indicated by the changes 
jn the arc of vibration, may he readily 
found, with the affiftance of the rules of 
addition and fubtraction. 
Mr. J. Curaserrson, of Poland- 
fireet, has examined Volta’s experiments, 
which he calls fuzdameutal, and upon 
which his theory-of Galvanilm refts, and, 
after various trials, he has found, that 
only ove out of the three fucceeds. 
M. D’Ousson is publifhing the Bio- 
graphy of all the Sultans of Conftantino- 
ple. This work he draws from original 
materials, which his long refidence in that 
capital, and his perfeét knowledge of the 
Turkifh language, were able to afford 
him. The life of each Sultan will be ac- 
companied by his portrait, copied from 
the original portraits, which are carefully 
kept in the Seraglio of the Grand Seignior, 
LABORDE’s Voyage Pittorefgue in Spain 
williconfift of four volumes. The firlt 
volume will contain his entrance into Spain 
in the neighbaurhood of Barreges, and 
the moft remarkable parts of the Spanifh 
Pyrenees, together with picturefque views 
of Montferrat, Barcelona, the antiquities 
of Tarragona and Saguatum, the environs 
of Valencia, Alicant, Carthagena, and 
the kingdom of Murcia.—The fecond vo- 
Jume will comprehend the kingdom ‘of 
Grenada, Cordova, Seville, and the re- 
mainder of Andalufia.—-The third volume 
will contain the northern Provinces of 
Spain ; the aqueduct of Segvia, the ruins 
of Oxama, of Clunia, of Numantia ; the 
Gothic buildings of Burgos, of Leon, of 
Vailadolid ; views of Atturias, of. Arra- 
gon, of Galicia, and Bifcaya.—The 
fourth volume will be devoted to views of 
_ Madrid, and of the royal palaces or-coun- 
try feats in its neighbourhood, the gar- 
dens and marbles of St. Hdefonfe, the 
charming views of Aranjuez, and the 
riches of the E{curial, ; 
BONAPARTE propefes a prize-medal of 
zo0o0 franks for thé belt experiments 
which fhall be made every year upon the 
Galvanic fluid; and allo the fum of 
£0,000 franks to fuch perfons as fhall 
« * 
ee? S . i P ; r iz 
Literary and Philfophical Intelligence. 
[Sept 15 
promote eleétricity and.Galvanifm, in the 
fame degree as Franklin and Volta have 
advanced thofe f{ciences. Foreigners of 
all nations may be competitors. Wea 
. The following is a. method ufed in 
France for cleaning mufty cafks :—-Frefly 
cow-dung, diluted with water, in which 
four parts of falt, and one of common 
alum, are diffolyed ; mutt he boiled, toge= 
ther, and poured hot into thebarrel, which 
muft be bunged, and well-fhaken. This 
operation muft be performed feveral times, 
taking care to rinfe the cafk out every’ 
tinie with clean water, At Ada ter iat 
Dr. Parke, of Philadelphia, has per- 
feétly cured two perfons of pulmonary cons 
fumptions, by means of a falivatien. 4 
At Kiel there is an inftitution for the 
deat and dumb, at which the eleétric pile 
of Volta has been applied as a remedy 
for deatnefs. Thofe who have been in 
any degree recovered, are obferved to hear 
the letcer g the foneft, then e, and lat of, 
all7, Of the confonants, 7 is that which 
they firf hear, At pfefent no permanent 
good effects have beén producédet) 
The following procefs is made ufe of, 
for dying wool in the greafe of a permanent 
blue colour, from the darkeft to the light- 
eft tint :-Take four ounces ‘of the bef 
indigo, reduce’ it to a ‘very fine powder, 
and twelve’ pounds of waol in the greafe ;. 
put thé whole into a’ copper large enough 
to contain ailthe: wool to be dyed. As foon 
as the requifite colour js obtained, ‘the 
wool mutt be wathed and dried. > The lin, | 
quor remaining may be again-nfed to pro< 
duce Jighter blues, -M. FAvirnx affertsy. 
that the colour is as beautiful and -perma-: 
nevit as the fine blue produced by woad, 
and that by this method it lofes:lefs in 
weight, than if it were previoufly feoured. 
* About ‘the end of lat Arpril, fome. 
workmen, who. were employed in trench- 
ing a piece of ground belonging ‘to the 
Petrini family, and a (mall diftance ’ from 
Rome, difcovered the fkelcton of-an ani-, 
mal, which attracted their attention by 
the immenfe fize of its: bones. A bone 
of the Jeg, which they ‘meafured, was’ 
two feet and four inches in circumference. 
‘They alfo:found teveral teeth, fix inches. 
Jong, and very much refembling thofe 
found in Siberia, and on the banks of the 
Ohio, in America., By the careleffnefs of 
the workmen, this choice fragment of na-~. 
tural hiftory was very near being entirely 
demolifhed ; a part of it alfo, on expofure 
to the air, almoit immediately diffolved 
into afhes. It is f{uppofed that this fkele- 
tog belonged to one of thofe fpecies of 
iinmenfe aaimals, fuch as the Mammoth, 
ical ~ 9 ae 
