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Sect. II. Of Air in which a Candle, or Brimstone, has burned out 43

Sect. III. Of inflammable Air 55

Sect. IV. Of Air infected with Animal Respiration, or Putrefaction 70

Sect. V. Of Air in which a mixture of Brimstone and Filings of Iron has stood 105

Sect. VI. Of Nitrous Air 108

Sect. VII. Of Air infected with the fumes of burning Charcoal 129

Sect. VIII. Of the effect of the calcination of Metals, and of the effluvia of Paint made with White-Lead and Oil, on Air 133

Sect. IX. Of Marine Acid Air 143

Sect. X. Miscellaneous Observations 154


PART II.

Experiments and Observations made in the Year 1773, and the Beginning of 1774.

Sect. I. Observations on Alkaline Air 163

Sect. II. Of common Air diminished, and made noxious by various processes 177

Sect. III. Of Nitrous Air 203

Sect. IV. Of Marine Acid Air 229

Sect. V. Of Inflammable Air 242

Sect. VI. Of Fixed Air 248

Sect. VII. Miscellaneous Experiments 252

Sect. VIII. Queries, Speculations, and Hints 258


The APPENDIX.

Number I. Experiments made by Mr. Hey to prove that there is no Oil of Vitriol in water impregnated with Fixed Air 288

Number II. A Letter from Mr. Hey to Dr. Priestley, concerning the effects of fixed Air applied by way of Clyster 292

Number III. Observations on the Medicinal Uses of Fixed Air. By Thomas Percival, M. D. Fellow of the Royal Society, and of the Society of Antiquaries in London 300

Number IV. Extract of a Letter from William Falconer, M. D. of Bath 314

Number V. Extract of a Letter from Mr. William Bewley, of Great Massingham, Norfolk 317

Num. VI. A Letter from Dr. Franklin 321

Number VII. Extract of Letter from Mr. Henry of Manchester 323

THE INTRODUCTION.

SECTION I.