JV CONTENTS. 



Page. 

 3, 4. Watkins' dry galvanic battery — Eccentricity of Saturn's 



ring, _----. 1G2 



5, 6. An improved process for drying wood for glass-houses — 



Blowpipe simplified, - - - . 163 



7, 8. Linear unit— Smoke disperfeer of M. Millet, - 164 



9, Conductibility conferred by water, - - - 165 



CHEMICAL PHILOSOPHY. 



1. Litmus paper. "* " " " ■ ^65 



2. Liquid sulphurous acid, - - - - - 166 



3. 4. Crystallization of iodine — Note on the action of metals 



upon inflammable gases, - - - 168 



.5. Preservation of bones, and the employment of gelatine, 169 



6, 7, 8.. Color of the sea — Solar phosphori — Test of the strength 



of chlorine or chloride of lime, - - 170 



9. New indelible ink, ----- 172 



JO, 11. Detectionofpotatoe flour in that of wheat — Aspartic acid, 173 



12, 13. Extrication of gas from mushrooms — Antidote to prussic 



acid, -._-.- 174 



14, 15. Copal varnish — Oily and resinous products of the distil- 

 lation of wood, - - - - 175 



16, 17, 18. New method of discovering the presence of nitric 

 acid — ^^Reduction of boracic acid by hydrogen^On py- 

 rophorus, _ - - _ _ x76 



J9, 20. loduret of calcium and potassium — Instructions relative 



to the art of refining, - - - _ 177 



21. Pectic acid convertible into oxalic by an alkali, - 179 



22. Detection of corrosive sublingiate, - - - isi 



23. 24. On potassium and sodium — Test for vegetable and ani- 



mal matter, - - - _ . i82 



NATURAL HISTORY, 



1. Couzeranite, - - - _ _ igs 



2, 3, 4. Belemnites- — Number of salts, divisibility of matter — 



Preservation of cloth, furs, &c. - - 184 



5. Vision of the mole, _ - - . 135 



6, 7, 8. Observations on the influence of cold on new born chil- 



dren — Mortality among leeches during storms — Ossifi- 

 cation of the vitreous humor, - - - 186 

 9. Zoological weather glass, - „ .. , 187 



ARTS. 



1. Manufacture of red crayons, for drawing, - - 187 



2. On the Preservation of Potatoes, _ , , 188 



MEDICAL STATISTICS. 



1. Elements of Medical Statistics, &c. - „ , 188 



2. Urinary calculi, - - - - 190 



MISCELLANEOUS. 



1. Religious toleration in Russia, - - - 192 



2, 3. Examination of patent claims — French eggs and apples, 193 



