CONTENTS. 
of Water, drawn from the Results of empty Bottles sunk to 
different Depths im the Ocean. : sata 201 
New Determination of the Proportions of Hie Constituents of 
Water ; and the Density of certain Elastic Fluids... — 203 
Some Experiments made with a view to the Detection and Pre- 
vention of Frauds in the Sale of skimmed Milk; together with 
an Account of a simple Lactometer for effecting that Purpose. 
241 
Description of a new Method of forming Crucibles. .. 247 
On Refraction. .. - «. ee a han ae 
Process for preventing and corr age an peak ee in Wines, 
known by the Name of Ropiness. .. ee bascs aD4 
On Napier’s Rules of the Circular Parts. .. Apr) 
Theorems for the Summation of progressional Series. .. 265 
Proposal for an Apparatus for Flying by means of Moiion only. 
268 
A Demonstration of Lz GENDRE’s Theorem for solving such 
“spherical Triangles as have their Sides very small in Propor- 
tion to the Radius of the Sphere. .. : Pee 1): 
On the Change of Colour in Blue vegetable Colours by metallic 
Salis: «. Paar 
On the Solar i laow Bete 7th Scatember 1820. sie pee 
Account of a aba 26) atus for restoring the Action of the 
Lungs. - oe oy si “a, ah0 
An Account of ie fetes of various British Standards of 
linear Measure. a : 280, 335 
On Shot Cartridges. $3 is ae ve 288 
Remarks tending to facilitate the Analysis of Sphint and Mi- 
neral Waters. es wet aol 
Observations on the present State ppiaeidahid tenet 321 
On Maver’s Formula for the astronomical Refraction. 341 
Account of the Native Rein on the Southern Shore of Lake 
Superior. ‘cm as ee ° -- 348 
Observations and Bin porimantasg on ride Rose of Jer icho. 360 
Concessions to Mr. Ivory. rm , aie eae mene 
The second Portion of a Catalogue of 1800 xediacal Stars. 367 
On the Decomposition of Metallic Salts by the Magnet. — 380 
Description of an Appendage to Torrt’s Blowpipe, to make it 
serve as a Substitule for Bruokss’s Gas Blowpipe. 01 
