ENGRAVINGS. - : 
Vol. LI. A Plate illustrative of Dr. Ure’s Experiments on Caloric, 
irs Luvexcock’s Paper on the Atomic Philosophy, and Mr. Botton’s 
he Purification of Coal Gas.—A Plate representing Mr. Renwir’s. 
atus employed in his Experiments on the Strength of Materials; 
the Marquis Ripoupxi’s Improvement on the Gas Blow-pipe.—-A 
illustrative of Mr. Meixxe’s. Paper on Calorific Radiation; Mr. 
’s on the Purification of Coal Gas; and Mr. Hucues’s on ascer- 
g Distances. — A Plate illustrative of Dr. OLinruus Grecory’s 
on the different Rates of Pennincton’s Astronomical Clock at the 
d of Balta, and at Woolwich Common. 
LIV. A Plate illustrative of the Menai Brincr.—A Plate ilins- 
e of Mr. Lowe’s Description of a Mercurial Pendulum.—A Plate 
ative of Mr. Hare’s Calorimotor, a new Galvanic Instrument. —A. 
illustrative of Captain Sasrne’s Paper on Irregularities observed in 
Jirection of the Compass Needles of the Isabella and Alexander in 
te Voyage of Discovery; and Mr. Scoressy’s Anomaly in the Va. 
on of the Magnetic Needle as observed on Ship-board, ia 
I. LV. A Plate exhibiting Sketch of the Comet’s Path of July 1819. 
Plate illustrative of the Annular-Eclipse of the Sun on the 7th of 
mber next.—A Plate illustrative of Mr. Lane’s Instrument for 
ering Fruit; Mr. Younc’s Mode of preparing Opinm from the 
er somniferum; and of Captain Forman’s Essay on a Property in 
which hitherto has been unobserved by Philosophers.-A Plate de- 
mptive of Mr. Curnsert’s improved Hydro-pneumatic Apparatus, &c. 
“A Plate illnstrative of Capt. Forman’s Essay on the Reflection, Refrac- 
in, and Inflection of Light, &c.; and Mr. Cuarizs Bonnycastie’s 
munication respecting the Influence of Masses of [ron on the Mari- 
Compass. ‘ ; waite ie 
Vol. LVI. A Plate illustrative of Mrs. Ienerson’s Paper on the Phy- 
logy of Botany.—A Plate iliustrative of Mr. Hatv’s Percussion Gun= 
of Dr. Kircuiner’s Pancratic Eye-Tube; and of Mr. Parx’s 
g Blocks.—-A Plate exhibiting Sections, &c. of Mr. Maram’s im- - 
Gas-Meter.—A Piate exhibiting the Discoveries made by Capt. 
in the Polar Sea; o eee. ¥y- 
LVII. A Plate illustrative of Mess. Gixstep and Amprre’s 
-magnetic Experiments, and Mr. Perxins’s Paper on the Cor. 
ity of Water.—A Plate illustrative of Mr. Jamreson’s Marine 
lermometer Case, and Mr. Jennincs’s Mercurial Log-Glass.—A Plate 
istrative of Dr. Hare’s new Modification of Galvanic Apparatus —A 
te representing a Double Canal Lock, originally proposed forthe Re- 
nt’s Canal, by Mr. R. H. Gower; and a Modification of Electro-Miig- 
tic Apparatus, by Mr. Tarum, ~ ; 
. LVIIL. A Plate illustrative of Mr. Gro. Innrs’s Calculations of - 
: Annular Eclipse of the Sun, which will happen on the 15ch of May 
.—A. Plate descriptive of the Hydrostatic Balances of Isatan 
kens and Dr, Coares,—A Plate illustrative of An Introduction to 
| Knowledge of Funguses,”’—A Plate illustrative of Professor Davy's. 
ctometer, and of Mr, Joun Murray's portable Apparatus for restor- 
y the Action of the Lungs.—A Plate by Porren, illustrative of Mr. 
cHootcrarr’s Account of the Native Copper on the Southern Shore of 
ake Superior; and of Dr. Miziar’s Observations and Experiments on 
Rose of Jericho. 
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