CONTENTS. 
Method of ascertaining Distances from one Station to another 
(in Levelling or Surveying) on Level and variously inclined 
Surfaces, to their exact Length of Horizontal Base, by the 
Addition of an a a Babble attached to the Telescope of 
a Spirit Level. ar om spite 1 
On the Respiration of Oxygen Gas, in an Affecti ion of the Thorax. 
273 
Description of the American Tar and Water Burner invented by 
Mr. SamMvuEt Morky of the United States. .. .. 274 
A Letter to Professor Jamxson, by Mr. Joun Farey, Sen, 275 
On Wheel-Carriages, and the Incapacity of most Roads to sus- 
tain. the Wear of very heavy Loads. .. . «+ -- 276 
Memoirs of the Life of Lewis BruGNaTELLt, M.D. Profisson af 
Chemistry in the University of Pavia, M Member of the Impe- 
rial-royal Institute of Science, Literature and Arts of Mi- 
lan, &¥c. ‘ on cae or Ne nd 
On the Fallacy of ‘the Experiments in wiht Water is said to 
have been formed by the Decomposition of Chlorine. 326 
Observations on a Species of Limosella recently discovered in the 
United States, by Dr. E11 lvgs. i's oe .. 328 
On the urinary Organs and Secretions of some of the Amphibia. 
330 
On the Earthquake felt in Sicily in February 1818. .. 332 
Observations on the immense Loss of Lives through Shipwreck, 
and Opinions of various Persons concurring, respecting the 
» Means to be used to afford Preservation: also, most sattsfac- 
tory Reports on Experiments made by a Life-preserving Ap- 
paratus, recently invented by H. TRENGROUSE. -» 337 
A Letter tothe Farmers and Graxiers of Great Britain; to ex- 
plain the Advantages of using Salt in the various Branches of 
Agriculture and in Feeding all Kinds of Farming Stock. 343 
On Sulphuretted Azote, “ hei inca weal and eff phlogistic 
358 
Phenomena. .. ay - ee 
Analysis of the Chalybeate aie at Thetford. oe * O09 
On the Insulated or Safety va and lately invented by Mr. 
JENNINGS. si ae ee \ “OOD 
On Dr. Murray’: s ‘Siatenant rhiiasiig the Origin of the Doc- 
trine of Definite Proportions, and the Arrangement of the 
Elementary Principles of Chemical Compounds. By Wit- 
LIAM Hicerns, Esq. a Petre we 401 
Description of a new Species of North ads Marten (Mus- 
tela vulpina). ,. oe oe ee ee ~» 411 
