2 Literary end Pb 
dation of two Schclarthips in St. John’s, 
each of which will be gol. per annum. 
The Vice-Chancellor, for the time being, 
and the Heads of Trini ty and St. John’s, 
are to have the nomination in all thele ap- 
poin'ments, 
Among the clafs of difcoveries which 
may be confidered asan improvement in the 
ufeful arts, and which may tend materially 
to affiit the commerce of the country in 
iis flaple manut facture, as well as to pre- 
ferve the health of its inhabitants, the 
improved method of Méeffrs: Duke and 
Co. 43, Aldermanbury, Londen, — for 
making wocllen and other ‘cloths ~water- 
proof, Nati ees etpeeial notice. * Tt differs 
from other fimilar Inventions, in not in- 
parting grealy quali ties, ard in. pot caus’ 
ag ‘any alteration inthe 
texture of the Goth. 
A print, reprefent ting 
Exeter Cathedral, freny 2 drawing made 
by FY Nafi, in the fummer of 1802, 
will fpeedity be publifhed. ~ ; 
A new. Gexibie tube for the gazes has 
been invented: it confis of a brafs wire; 
twifled round a lois thin cylinder, and 
covered with oiled “ilk, twice wrapped 
rounc, and, faftened, OF, means of thread, 
betiveen the groves of the wire. It is 
then again-varnifhed, and covered in a fbi. 
ral manner with fheep-gut, fit longitudi- 
nay, and again fecured with thread. 
Lafily, to piotect the whole from external 
injury, itis to be covered with leather in 
the iame thannér as the tubes of inhalers. 
Thefe flexible tubes anfwer the fame pur- 
pote as the very tonly ones: of ela hic gum, 
fimilar to the “‘héllow bougies made for 
fargeons. 
Mr. E |. WALKER, in further profecu- 
tion of his experiments On the quantity 
of light sfforded by candles, obferves, 
that when a lighted candle is {o piaced, as 
neither to requit re fnufiig,orpreducefmoke, 
it isreafunable to conclide. thatthe whole of 
the comiuftible matter which is confumed, 
is converted to’ the a ou of gue a ae 
Behr; and that the intenfities of lisht, ge- 
nerated in a given time by candles of diffe- 
refit dimehfions, are dircG@ly as the quan- 
tities of matter confumed ; 5 that is to fay, 
when candles ere made of the fame mate- 
riais, if .cne pred duce twice as much light 
as. another, the former will, in the fame 
fime, lo’e twice as much weight as the 
Yatter. “The following general law Mr. 
Walker fiates as the relults of many ex- 
periments : :— Where combufticn is com- 
plcae, the quantities of light produced by 
tallow cancles are in the duplicate ratio 
of their times of burning and weights of 
appearance or 
the intericr of 
dlofophical. Intelligences 
under certain circunitances, 
[Feb. 1, 
matter confumed. For,by experiment, it is 
tound, that if their quantities of matter be 
equal, and times of burning be the fame, 
they will give equal quantities of light ; 
and, if the times of burning be equal, 
the quantities of light will be dire@ly as 
their weights expended’ therefore, the 
light is univerfaliy in the compound ra- 
tio of the time of burning and weight of 
matter confumed. Mr. Walker eoncludes, 
with oblerving, thar it is the fadden 
changes pr oduced by toute ‘g; and not the 
heht “iclelf, that dees fo much 3 injury to 
the eye of the fludent and artift—an injur 
that may be eafily prevented by laying 
afide the fouffer rs, and, in the place of one 
large candle, to eke ule of two, 
‘It has been afcertained by Mr. W. 
WiLson, that the thavings of wood, cut 
are frongly 
ele€trical) From faundry experiments, it 
appears, that where very dry wood is 
fcraped with a piece Of wi _. glafs, the 
fhavings are always pofitively eleftrified ; 
and, if chipped with-a knife, the chips 
are poke ively electrified, if the wood be hot, 
aud tie edge of the knife mot very fharp ; 
but ively elcGtrified, if the woed be 
quite cold 5 if,’ however, the edge of the 
knife; is very keen, the chips will be nega- 
tively cle&trified, whether the wood be hot 
6r cold. Ifa piece of dry and warm 
wood is fuddenly {plit afunder, the two 
furfaces, which were Contiguous, are élec- 
trified, one fide poiitive, and the other ne- 
eative. 
Mr. J. Harriorr Haeiaventes a new 
engine for raifing and loweting weights, 
and for other purpofes, by the action of a 
column of water. 
engine confifts in combining wade ae 
the fyphon, with the direét preflure of a 
slumn or itream of water, fo that they 
may act together. It works by means of the 
fyphon confantly afting in concert witl h 
the feeding ftream of water, fo that each 
alternately a act on the upper and lower 
part of a pifien, within a cylinder, as i€ 
were, reverfing the fyphon at each changes 
and’ the power is equaltoa column of wa- 
ter of the fame diameter as that of the cy-~ 
linder, and equal in length to the height o 
the head above the taid-water. By this 
nega 
engine, itis {aid, that a boy can raife or 
lower gouds of any weight, without other 
exertion than that of merely turning a 
cock to the ftop-mark in the index. Ie 
raifes ard lowers gocds with thrice the 
velocity ufually preduced by manual 
labour, The ingenious inventor | has 
pointed out a variety of other purpofes ta 
which this dilcovery may be applied. 
The’ 
The principle of this _ 
