1803.] 
vations lie fcattered through his prefaces, 
and his volume of Critical Remarks, which 
it appears defirable fhould be given to the 
public difencumbered of the mafs of cri- 
ticifms, which are not of fo much impor- 
tance to the general reader, =~ 
Mr. Smart, of Camden Town, the in- 
genious patentee of the * bollow mats,” 
has invented a Machine for Sweeping 
Chimneys, which has been exhibited inthe 
prefence of Sir Jofeph Banks and others, 
and is faid completely to anfwer their ex- 
pectations. The whole of the machinery 
weighs no more than fourteen pounds, and 
it will foldupin the fpace of fix or feven 
{quare inches. : 
Mr. B. Hooxe, of Fleet-ftreet, has 
conftruéted an excellent blow-pipe by al- 
cohol, which, befides having a fafety- 
valve to prevent accidents, has only one 
lamp, and the wick being pretty large, 
an{fwers both! for heating the alcohol, and 
for affording a ftrong blaft when drawn 
through it. | 
We announced, in our laft, the return 
of Mefirs. CLarKE.and CRiPPs to Cam- 
bridge, from, their travels in fearch of li- 
terary curiofities ; fince which they have 
announced in the new{papers their acqui- 
fition of the following manufcripts : From 
Patmos, 1. The Works of Plato, mott 
beautifully written upon vellum, in folio. 
Fhe Scholia, in minute capitals. The 
Colophon proves that it was written by 
john, the Calligraph, for Arethas, Dea- 
con of Patre, for 13 Byzantine Num- 
mi, in the fourteenth Year of the Indic- 
tion, and the 6404th of the World (A.C. 
$96.) in the Reign of Leo, fon of Bafilius. 
2. Lexicon of St. Cyril, of Alexandria. 
3- Greek Poetry, accompanied by ancient 
Greek Mufical Notes. 4. Ditto, ditto. 
s. The Works of Gregory of Nazianzum. 
~—From Naxos, Copies of the Gofpels, in 
capitals, of very ancient date.—Prom 
Mount Athos, 1. The Orations of De- 
mofthenes. 2. The Works of ten Athe- 
nian Orators, fome of which not hitherto 
known.—From Conftantinople, x. The 
Works of Dionyfius, the Areppagite, 
with a curious and learned Commentary, 
written on vellum, in folio. 2. Complete 
Copy of the Gofpels, written in the eighth 
Ceatury. 3. 4. 5.6.Various Copies of the 
Gotpels and oi the Epiitles, aud Aéts of 
the Apofties, of different dates. 7. The 
Works of Philip the Hermit. 8. The 
Dialogues of Theodore, the Syracufan, 
9. A Work onthe Greek Grammar. 10. 
z1.12. The Writings of Commentators 
on the Gofpels; and the Works of the 
eprliek Fathers of theChurch. 13. Very 
inches from the end. 
Literary and Philofophical Intelligence. 159° 
ancient Copy of the Evangeliftarium of 
the Greek Church. 14. Ditto, ditto. 
15. A Work of Philes on Animals. 
It appears, from fome experiments 
‘made by Mr. E. WALKER, that aconttic 
inftruments may be conftruéted for con- 
verfing at a diftance, without the affiftance | 
of tubes to convey the found. ‘* Ex. x. 
I took a deal rod, fixteen feet long, and 
about an inch fquare, and, after having 
fixed one end of it into the fmall end of a 
{peaking-trumpet, I laid it upon two 
preps, m an horizontal pofition. One of 
the props was placed under the trumpet, 
about three inches from its wide end, and 
the other prop was placed near the other 
end of the rod: another fpeaking-trumpet 
was then faid acrofs the rod, about three 
The wide part of 
this trumpet refted upon the rod, but the 
other end was fufpended by a ribband. 
‘The apparatus thus adjufted, I introdu- 
ced a watch into the end of the trumpet, 
and, applying my ear to the crofs-trum- 
pet, I heard beats much louder than if 
the watch had been at the diftance of a 
few inches only. The found appeared to 
come out of the crofs-trumpet, although 
the watch was at the diftance of feventeen 
feet and a half; and, when it was laid 
into the crofs trumpet, it was heard equal- 
ly well at the end-trumpet. Ex. 2. My 
affittant in thefe experiments being feated 
at one end of the trumpet, and myfelf at 
the other, a converfation tock place 
through this apparatus, but in whifpers 
too low to be heard through the air at 
that diltance. When the ear was placed 
in a certain pofition, the words were 
heard as if they had been fpoken by an in- 
vifible being within the trumpet ; and the 
found was more diftinét, fofter, and more 
mufical, than if they had been fpoken 
through the air.”> Mr. Walker infers 
from thefe experiments, that, if a commu- 
nication were made on this principle be- 
tween a fhop or warchoufe, and the dining- 
room, &c. it might contribute to the dif- 
patch of bufinels; and inftruments might 
be formed on the fame principle, and in- 
troduced between the parlour and fervants” 
hall, fo that direétions might be given to 
a domeftic without his entering the reom, 
and in whifpers too low to difturb the 
company. 3 
At the Anniverfary Meeting of the 
Highland Society of Scotland, the reports 
of the committee for promoting the im- 
provements of the Highlands, by roads 
and bridges, and the projected canal acrofs - 
the ifland, from Invernefs to Fort Wil- 
iam, were laid before the Society, toge- 
Xz ther 
