610 
fieSion, he fubfitutes cylinders, or nearly 
fegments of cylinders: but as the expence 
of them, if made of folid glafs, would be 
confiderable, he recommends bottles to be 
filled of pure fluid, which, by a fimple ap- 
paratus, are to be introduced into an ordi- 
nary lamp. As the reward of his inge- 
nuity, the Count has obtained a patent 
for his cylinders. 
Mr. JonN Apams has given us an 
«* Analyfis of Horlemanthip, teaching the 
whole Art of Riding, in the Manege, Mi- 
litary, Hunting, Racing, or Travelling 
Syftem; together with the Method of 
Breaking Horfes, and Dreffing them to 
all Kinds of Manege.’? Mr. Adams is 
a riding-mafter of confiderable repute, and 
his volume: is patronized by the Duke of 
York. 
«© The Lifbon Guide; contaming Di- 
rections to Invalids who vifit Lifbon; 
* with a Defcription of the City, and Ta- 
bles of the Coin, Weights, and Meafures 
of Portugal.”” This will be found a very 
ufeful work by thofe poor creatures for 
whofe convenience it is principally in- 
tended. 
Mr. Bent has publifhed «¢ Eight Me- 
teorological Journals of the Years 1793 
to 1800, kept in London,” &c. Theac- 
curacy of Mr. Bent is well known: we 
mention the publicaticn of his journals, 
thus colleéted into one’ volume, merely 
for the fake of form. 
The following three pamphlets have 
appeared ona fubject of high importance: 
«*Account of a Planfor the better Supply- 
ing theCity of Edinburgh with Coal; toge- 
ther with an Examination of the Me- 
rits of the two principal Lines point- 
ed out for the intended Canal between 
Edinburgh and Glafgow, by HEnry 
Srewart, Efq. L.L.D. F.R. and 
A. S.3Bs 
‘¢ Obfervations on the Account of a 
Plan for the better Supplying the Cities 
of Edinburgh and Glaigow with Coal, 
by on old Coal-mafter.”” 
<¢ Supplement to an Account of a Plan 
for the better Supplying the City of Edin- 
burgh with Coal; comprifing an Exami- 
nation of an Anonymous Pamphlet lately 
publifhed, nnder the Signature of an old 
Coal-mafter, by H. Stuart, Efq. L. L. D. 
PUR. S: andi A. Sib. 
- We cannot enter into this controverfy, 
which is carried on with very unequal abi- 
lity: Dr. Stuart urging his arguments 
with great force and kill, the old Coal- 
Retrofpeé of Domeftic- 
Literature Mifcellanics 
mafter with all the clumfinefs and impee 
tence imaginable. s 
We fhall conclude our Retrofpeét for 
_ the prefent half year with announcing the 
publication of the fecond part of the 
** Philofophical Tranfaétions of the Royal 
Society of London, for the Year 1800.” - 
Itis impoffible not to congratulate the 
public on the fpirit of induftry which 
feems now to animate this learned Socie- 
ty, and which, we truft, will make it emu- 
lous of the fame of fimilar focieties on the — 
Continient. There is to bea third part, 
for the year 1800, immediately publithed. 
The prefent part contains the following 
Effays: On Double Images caufed by 
Atmofpherical Refraéion, by William 
' Hyde Wollafton, M. D.—Inveftigation 
of the Powers of the Prifmatic Colours to 
Heat and Illuminate Objeéts; with Re- 
marks that prove the different Refrangibi- 
lity of Radiant Heat: to which is added, 
an Inquiry into ‘the Methéd of Viewing 
the Sun advantageoufly with Telefcopes 
of large Apertures and high Magnifying 
Powers, by Wiliam Hertchel, L.L. D. 
This isa very curious paper, and contains 
much new matter, . Dr. Herfchelhas dif- 
covered that the coloured rays pofiefs a 
heating power in fo confiderable a degree 
that a thermometer is raifed feven degrees 
by the red-rays being made to ftick upon 
it. They alfo poflefs an illuminating 
power. All thofe who delight i optical 
purfuits. will be eager to be in pofleffion 
of the refult of the Do&tor’s minute re- 
fearches.—The next paper contains Ex- 
periments on the Retrangibility of the 
Invifible Rays of the Sun; and. the next, 
Experiments on the Solar and on the Ter- 
reftrial Rays that occafion Heat: with’ a 
-Comparative View of the Laws to which 
Light and Heat, or rather the Rays which 
occafion them, are fubjeét, in order to des 
termine whether they are the fame or dif- 
ferent: both of thefe are alfo by Dr. 
Herfche]l.—Thefe are followed by Chemi- 
cal Experiments on Zoophytes; with 
'fome Obfervations on the Component 
Parts of Membrane, by Charles Hatchett, 
Eiq.—A Letter from Profeffor Volta to 
“Sir Jofeph Banks, on the Electricity ex- 
cited by the mere Contaét of conduéting 
Subfiances of different Kinds, which is 
well known to have given rife to numer- 
ous experiments in this country; and 
fome*Obfervations on the Head of the 
Ornithorynchus Paradoxus, by Everard 
Home, Eq. ‘ ; HALF 
ah? 
