Transcriber Notes:Uncertain or antiquated spellings or ancient words were not corrected.The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate.Errors in punctuation and inconsistent hyphenation were not corrected unless otherwise noted.Typographical errors have been silently corrected but other variations in spelling and punctuation remain unaltered.
Transcriber Notes:
Uncertain or antiquated spellings or ancient words were not corrected.
The illustrations have been moved so that they do not break up paragraphs and so that they are next to the text they illustrate.
Errors in punctuation and inconsistent hyphenation were not corrected unless otherwise noted.
Typographical errors have been silently corrected but other variations in spelling and punctuation remain unaltered.
FOOTNOTES:
[1]Memoirs for a General History of the Air; Shaw’s Abridgment of Boyle’s works, edition 1725, vol. iii. p. 26.[2]“Suspicions about some hidden qualities of the Air,”ibid.p. 77.[3]A Free Inquiry into the Vulgar Notion of Nature; Prefatory remarks.[4]Experiments and Observations on Different Kinds of Air, vol. ii. By Joseph Priestley, LL.D., F.R.S. Second edition (1776), p. 29.[5]Chemical Treatise on Air and Fire(1777), § 3.[6]Loc. cit.p. 46.[7]Loc. cit.p. 55.[8]Loc. cit.p. 94.[9]Loc. cit.p. 102.[10]The accurate translation of Scheele’sTreatisepublishedby the Alembic Club (William F. Clay, 1894) has been made use of here.[11]§ 4.[12]§ 5.[13]§ 16.[14]§ 16.[15]§ 22.[16]§ 23.[17]§ 24.[18]§ 29.[19]§ 80.[20]§ 87.[21]§ 93.[22]This, as previously remarked, had already been noticed. In Maquer’sÉlémens de Chymie-pratique, published in 1752, a work which ran through many editions, we read (p. 307): “There happens during all these calcinations, and especially in that of lead, a very strange phenomenon for which it is very difficult to assign a reason. It is that those bodies, which lose no small proportion of their substance, whether by the dissipation of phlogiston, or because part of the metal is exhaled as vapour, yieldcalcesincreased in weight after calcination; and this increase is by no means inconsiderable.... Physicists and chemists have devised many ingenious systems to account for this phenomenon, but no one of them is absolutely satisfactory. As no well-established theory has been devised, we shall not undertake to attempt an explanation of this singular fact.”[23]Brit. Assoc. Report, 1839, p. 64.[24]Experiments and Observations on Different Kinds of Air, vol. i. p. 181, and vol. ii. p. 238. Second edition, 1776.[25]Proc. Roy. Soc.vol. liii. p. 134.[26]Proc. Roy. Soc.vol. lix. p. 68.Phil. Trans.vol. clxxxvi. p. 227.[27]Compt. rend.vol. cxxi. p. 394.[28]Méchanique céleste, vol. v. p. 123.[29]Proc. Roy. Soc.vol. lix. p. 63.[30]These considerations would hold on the assumption that no combination takes place between chlorine and bromine.
[1]Memoirs for a General History of the Air; Shaw’s Abridgment of Boyle’s works, edition 1725, vol. iii. p. 26.
[1]Memoirs for a General History of the Air; Shaw’s Abridgment of Boyle’s works, edition 1725, vol. iii. p. 26.
[2]“Suspicions about some hidden qualities of the Air,”ibid.p. 77.
[2]“Suspicions about some hidden qualities of the Air,”ibid.p. 77.
[3]A Free Inquiry into the Vulgar Notion of Nature; Prefatory remarks.
[3]A Free Inquiry into the Vulgar Notion of Nature; Prefatory remarks.
[4]Experiments and Observations on Different Kinds of Air, vol. ii. By Joseph Priestley, LL.D., F.R.S. Second edition (1776), p. 29.
[4]Experiments and Observations on Different Kinds of Air, vol. ii. By Joseph Priestley, LL.D., F.R.S. Second edition (1776), p. 29.
[5]Chemical Treatise on Air and Fire(1777), § 3.
[5]Chemical Treatise on Air and Fire(1777), § 3.
[6]Loc. cit.p. 46.
[6]Loc. cit.p. 46.
[7]Loc. cit.p. 55.
[7]Loc. cit.p. 55.
[8]Loc. cit.p. 94.
[8]Loc. cit.p. 94.
[9]Loc. cit.p. 102.
[9]Loc. cit.p. 102.
[10]The accurate translation of Scheele’sTreatisepublishedby the Alembic Club (William F. Clay, 1894) has been made use of here.
[10]The accurate translation of Scheele’sTreatisepublishedby the Alembic Club (William F. Clay, 1894) has been made use of here.
[11]§ 4.
[11]§ 4.
[12]§ 5.
[12]§ 5.
[13]§ 16.
[13]§ 16.
[14]§ 16.
[14]§ 16.
[15]§ 22.
[15]§ 22.
[16]§ 23.
[16]§ 23.
[17]§ 24.
[17]§ 24.
[18]§ 29.
[18]§ 29.
[19]§ 80.
[19]§ 80.
[20]§ 87.
[20]§ 87.
[21]§ 93.
[21]§ 93.
[22]This, as previously remarked, had already been noticed. In Maquer’sÉlémens de Chymie-pratique, published in 1752, a work which ran through many editions, we read (p. 307): “There happens during all these calcinations, and especially in that of lead, a very strange phenomenon for which it is very difficult to assign a reason. It is that those bodies, which lose no small proportion of their substance, whether by the dissipation of phlogiston, or because part of the metal is exhaled as vapour, yieldcalcesincreased in weight after calcination; and this increase is by no means inconsiderable.... Physicists and chemists have devised many ingenious systems to account for this phenomenon, but no one of them is absolutely satisfactory. As no well-established theory has been devised, we shall not undertake to attempt an explanation of this singular fact.”
[22]This, as previously remarked, had already been noticed. In Maquer’sÉlémens de Chymie-pratique, published in 1752, a work which ran through many editions, we read (p. 307): “There happens during all these calcinations, and especially in that of lead, a very strange phenomenon for which it is very difficult to assign a reason. It is that those bodies, which lose no small proportion of their substance, whether by the dissipation of phlogiston, or because part of the metal is exhaled as vapour, yieldcalcesincreased in weight after calcination; and this increase is by no means inconsiderable.... Physicists and chemists have devised many ingenious systems to account for this phenomenon, but no one of them is absolutely satisfactory. As no well-established theory has been devised, we shall not undertake to attempt an explanation of this singular fact.”
[23]Brit. Assoc. Report, 1839, p. 64.
[23]Brit. Assoc. Report, 1839, p. 64.
[24]Experiments and Observations on Different Kinds of Air, vol. i. p. 181, and vol. ii. p. 238. Second edition, 1776.
[24]Experiments and Observations on Different Kinds of Air, vol. i. p. 181, and vol. ii. p. 238. Second edition, 1776.
[25]Proc. Roy. Soc.vol. liii. p. 134.
[25]Proc. Roy. Soc.vol. liii. p. 134.
[26]Proc. Roy. Soc.vol. lix. p. 68.Phil. Trans.vol. clxxxvi. p. 227.
[26]Proc. Roy. Soc.vol. lix. p. 68.Phil. Trans.vol. clxxxvi. p. 227.
[27]Compt. rend.vol. cxxi. p. 394.
[27]Compt. rend.vol. cxxi. p. 394.
[28]Méchanique céleste, vol. v. p. 123.
[28]Méchanique céleste, vol. v. p. 123.
[29]Proc. Roy. Soc.vol. lix. p. 63.
[29]Proc. Roy. Soc.vol. lix. p. 63.
[30]These considerations would hold on the assumption that no combination takes place between chlorine and bromine.
[30]These considerations would hold on the assumption that no combination takes place between chlorine and bromine.