The Sun.
London, England, 1802-04-19 00:00:00

WALKER's 'LECTURES ON NATURAL
PH.tLOSOPHY..

This Day were published,
Handsomely printed in Two Vols. Medium Quarto; illus-'
trated by 49 Copper-plates, neatly engraved; price Two
Guineas and a Half in boards, or, 'for tlic.conveniente- of
those who" are desirous of purchasing this Work in „Parts,
No. I. price is. 6d, to be continued weekly till /he Whole is.
completed, in Thirty-±i,e. Numiyer;s;. of
16-1. SYSTEM .of FAMILIAR PHILOSOPHY,
in Twelve Lean:es; being the Cowse usjially read by
Mr. WALKER, of Conduit-street, flano'Ver-quare. • Con-
mining the Elements and the PraetiCal Uses to be drawn from-
the Chemical Properties of Matter the-Principles and Ap-
plication of Mechanics, of Hydrostatics, of Hydranlids,-of
Pneumatics, of Magnetism, or Electricity, of Optics, and of
Astronomy, including every material modern Discovery and
I inprovement to the present.time.
• For the satisfaction of the Public, we here give an Extract
of the principal Contents of each ,Ledure.,
. t. Introductory Le.Cture, containing some general ideas re-
speding.the System of Nature.
z. Of the Par-ticles of Matter, their minuteness;-Ardness;
extension,
_divisibility, inertia, and cohesion, and bn Magne—
tism.. gar • . . _

3, On Mechanical Powers, as applied tp the Windmill and
Travelling Corn-mill, W heel-carriages, containing a variety
of Experiments for the, linprovetneut •of Coaches, Carts,
Waggons' are.
' 4: On Chemistry ; on Acids, Alkalis, Distillation, Subli:, •
matioa ; on Affinitive AttraCtion, of 'Combustion, Metals,
Mineras,, Vegetable and Auinial _Analysis, Chentieal 'A ppa.,
ratus, Miscellaneous Obse;vations and Experiments in Che-
mistry,
_

5. On the Atmosphere, Mechanical and Chemical Proper-
ties of Air; on Wind, Air-guns, Wind-guns, on Sound, Sym-
pa,thy of Sound.
6 - Hydrostatics, Hydraulics ; of'Specific Gravities, on the
Diver's Bell, of Pumps, the'Rope Pump, the Forcing Pump,
Boulton and Watt's Steam Engine, Steam Engine with the
Cylinder in the Boiler.
7. • Elearicity, IntroduaOry Remarks on EleetricA Ma-
chines, on Points, on the aurae-lion• and repellency of Elec-
tricity, on the Leyden Vial.
. .

S. Electricity continued;of Spontaneous Elearicity, of
lightning, of Animal• Eleetricity, Medical Elcthicity, Ex-
periments, miscellaneous and entertaining. •
9, Optics;' on Vision, Optical Instruments, the Night-
lass, the RetVaCting and Retietting Telescopes, of the Single,
Douhl; or Cpmpound, Solar, and Opaque Microscope, the
Magic Lantern, Miscellaneous E Xperiments, Deceptions,
&e. &c.

to. Astronomy, C'eneral View of Creation ; Ancient Opi-
nions concerning it ; why the Earth must be a Globe ; Day,
Night, and the Seasons, how produced ; on the Celestial
Globe ; Origin and Use of the Constellations ; those useful
in Navigation ; Equinoxes; Zodiac ; Equation of .Time ;
Use of TiMe-keepers, &c.
it. On the Slew, her Mntion and Eclipses ; Horizontal
and Harvest. Moon ; on .the Cause of Tides in the Air. and
Sea.; on Currents. . .

. • . . . .
.
12. -Atholloiny continued ; Newtonian Doarine* respea-
ing the Laws of the Planetary Motion ; Character and Pro-
perties of the. Planets and their Morns; . use bf the-Nautical
phtnicris; on Altitude and Refraction ; on Comets, &c. •
Printed for the Author; at' his House, No. 42. ' Cciiidttit-
street, Hanover-square; and -.sold by G. • Kearsfey, Fleet-
street i-, Bell and Bradtute, Edinburgh ; Brash and Reid,
1 Glasgow • and Archer and Colbert, Dubin.