CONTENTS 



OF THE FORTY-FOURTH VOLUME. 



Description of a new G^zometer and Bhw-plpe 1 

 >^ome Exp.nraent.'! and Ohservolious on a nciv Substance which 



Vccomrs a violet-coloun a Gus ly Heat 3 



Propo.->aI fnr an Tmprovempvl vf the Galvanic Troi'i^h .'. 15 

 Enws of CuiTicus Secundus in his Communication re'spect- 



tng the Nautical Almanac for \fi\ 5 16 



An Account of a Family having Hands and Feet Vuith'super^ 



nnvicrary Fingers and T(.es ly 



Dtscrjplkr: r,f a new Appjaralus for preparing with FaciUtn 



and (I.Kmomy pvre Muriatic A"id 21 



An Account of some coloured Snow and Hoar-frost ' .*.' 23 

 ^tporf of the Proore^s of the Sciences in FrajKc i« 1813 25 



Memoir upon Pulladiimi and Rhodium 33 



On the l'>Huence of the Pressure of the 'Atmosphere 'on the 



Crysiallnnjion of Salts \ 44 



Some Account of file Life and IVritiiigs of Co'ndorcet' ' 81 

 Accou7it f some nnoy tar ulmoipkeuc'al Phce?iomena .. 91 

 Account of some vew Experim<:vis on th^ fluoric Compounds; uUk 

 so.ne .^O^rrm/jons on other Ofjfcts of dvmicai Inquiry 93 

 qfhi lal R,pjrt oj a Fall of .'crolUes near Grenade .. 100 

 rracticat Ihugramfor obtaining in a simph Manner the Cor- 

 rect'ou of the Lunar Distance a^ observed h, a Sextant 105 

 Hemarks on Mr. Hume's Cazometer and Blow-nipe. . 106 

 Memoir i,p„v the compound and smnoih or simple Eyes of In- 

 sects, and 01 the Manner in which these two Species of Eye<i 

 concur tn rision .. . •• . 107 183 274 



Reporf made by Order of the PhifomaYhin ' Society of Paris, 

 on tat Suf/ecl of the new Operations and Instruments for the 

 Cure of various Disea.ses nftlie Eye .. 119 



On some mw Electro-chemical Phcenomen'i .'. " * * 124 

 Account rf a new Species of Insect of the Genus Corvi*i:ies of 

 l^AiiRicivs,o/ served man Eo,jptiunMummy at G,enoHe V6\ 

 Explanation of the Cuticle of Leaves 161 



Report from the Select Cmmcttee on IVeights and Measures 171 

 Ue Opinions of Dr. Thomson and the Chevalier Delambre. 

 tn reference to Don Uodrigukz's Animadversions on the 

 ^rigonometrical Survey, contracted .. 181 



Pft^cularyespecthig Hail Storms in the tf^est'indie^^ .'.' 191 

 Uie^n/cal Inquiries mto tlo Nature of fatly Substances 193 

 Unthe Que.uon, Whether Alcohol be a Product of Ferment a- 

 iion, or of Distillation P .... 207 



