22 Meldrum, Development of the Atoiiiic Theory. 



1808. 



34. "New System of Chemical Philosophy," by John Dalton, 



pp. 150-208. 



1809. 



35. " Experiments on the expansion of moist air raised to a 



boiling temperature," by John Gough. Written May 

 22nd. Pub. Nicholsoiis Jour.., [2], vol. 23, p 182. 



36. " Sur le melange reciprcque des gaz," par C. L. Berthollet. 



Mem. cfArceiiit, vol. 2, p. 463 (a repetition of Dalton's 

 experiments in no. 14). 



1826. 



37. " On the constitution of the Atmosphere," by John Dalton. 



Fhil. Irans., part 2, p. 174. 



1837- 



38. " Sequel to an Essay on the constitution of the Atmosphere," 



by John Dalton. Phil. Trans., p. 347. 



1834. 



39. Dr. Prout's reply to Dr. W. Charles Henry. Written July 



iSth. Phil. Mag., [3], vol 5, p. 133. 



1844. 



40. " Observations on the Diffusion of Gases," by T. S. 



Thomson. Phil Mag., [3], vol. 25, p. 51. 



1842. 



41. "Elements of Chemistry," by Thomas Graham, pp. 69, 



70. 71, 75- 



