- 20 Mar. 1840
Part of Additional Manuscripts a
'It is as you say quite a scandal that no ascent has been made for scientific purposes since that of Gay Lussac. Though I hope when you see my paper on Refraction you will admit that this problem is nearly put at rest, for I make observations of steam, vapour of Alcohol and confirm my law of the connexion between pressure and temperature, which is quite different from what has been supposed'. JWL has had a long discussion with the aeronaut Mr Green: 'It would not do to set about the thing with less than £1,500 [to make a balloon to investigate the atmosphere?]. JWL is annoyed at John Herschel for leaving out all notice of his work on lunar theory in his address to the Astronomical Society.