ENGRAVINGS. 
Y ol. LI. A Plate illustrative of Dr. Ure’s Experiments on Caloric, 
Tr “Lucxcock’s Paper on the Atomic Philosophy, and Mr. Borton’s 
ithe Purification of Coal Gas.—A Plate representing Mr. Renwniz’s 
pparatus employed in his Experiments on the Strength of Materials; 
ate illustrative of Mr. Merkue’s Paper on Calorific Radiation; Mr, 
jowe’s on the Purification of Coal Gas; and Mr. Hucues’s on ascer- 
lining Distances. — A Plate illustrative of Dr. OLintHus Grecory’s 
nd of Balta, and at Woolwich Common. 
ve of Mr. Lowe’s Description of a_Mercurial Pendulum.—A Plate. 
ive of Mr. Hare’s Calorimotor, a new Galvanic Instrument.—A 
illustrative of Captain Sapine’s Paper on Irregularities observed in 
e Direction of the Compass Needles of the Isabella and Alexander in 
he late Voyage of Discovery; and Mr. Scoressy’s Anomaly in the Va- 
n of the Magnetic Needle as observed on Ship-board, 
LV. A Plate exhibiting Sketch of the Comet’s Path of July 1819. 
ate illustrative of the Annular Eclipse of the Sun on the 7th of 
ber next,—A Plate illustrative of Mr. Lane’s Instrument for 
thering Fruit; Mr. Youne’s Mode of preparing Opium from the 
Mapaver somniferum; and of Captain Forman’s Essay on a Property in 
Light which hitherto has been unobserved by Philosophers.—A Plate de- 
fer;ptive of Mr. Curupert’s improved Hydro-pneumatic Apparatus, &c. 
e illustrative of Capt. Forman’s Essay on the Reflection, Refrac- 
“Inflection of Light, &c.; and Mr. Cuarrges BonnyCasTLe’s 
icacion respecting the Influence of Masses of Iron on the Mari- 
Ipass. eT UENO oe Si “a 
VI. A Plate illustrative of Mrs. Inperson’s Paper on the Phy» 
of Botany.—A Plate illustrative of Mr. Havv’s Percussion Gun- 
Lock; of ‘Dr, Kirentver’s Pancratic Eye-Tube ; and of Mr. Park’s” 
Mooring Blocks.—A Plate exhibiting Sections, &c. of Mr, Macam’s im- 
roved Gas-Meter.—A Plate exhibiting the Discoveries made by Capt. 
lazry in the Polar Sea, tes . ; 
VIII. A Plate illustrative of Mr. Geo. Innes’s Calculations of 
36.—A Plate descriptive of the Hydrostatic Balances of Isarau 
gxens and Dr. Coares,—A Plate illustrative of “« An Introduction to 
e Knowledge of Funguses.”—A Plate illustrative of Professor Davy's 
neter, and of Mr, Joun Murray's portable Apparatus for restore 
Action of the Lungs.—A Plate by Porter, illustrative of Mr. 
erior ; and of Dr. Mitran’s Observations and Experiments om 
ss, arate veoh oe aPlute- by Porrmr, ilus- 
son’s Appendage to Torrt’s Blowpipe. 
rats My. I ¥ ys a a - 
LXIX. A Plate illustrative of Mrs. Insxrson’s paper On the 
-buds of Trees passing through the Wood. 
per on the different Rates-of Penwin eron’s Astronomical Glock at the 
VWolLIV. A Plate illustrative of the Mexat Beipor.—A Plate illus | 
nabr’s Account of the Native Copper on the Southern Shore of 
id the Marquis Ripovrar’s Improvement on the Gas Blow-pipe-——A 
nular Eclipse of the Sun, which will happen on the 15th of May 
icho.—With a Porrsait of the Eprror, engraved by’ 
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