Meteorology. 230 



conipiised in 18 Lectures, will be delivered on Wednesday and 

 Friday Evenings, at Half past Eight o'clock precisely. Admis- 

 sion to the Course, Two Guineas. The Introductory Lecture 

 will consist of a general View of the Animal Structure. 



Particulars respecting the Lectures may be obtained by ap- 

 plication to the Lecturer, No. 3, Bolt Court, Fleet Street. 



Meteorological Observations. 



Since the 24 th ult. I have not been able to keep a regular 

 journal of the weatlier. The greatest part of the time 1 spent 

 at Hastings, on the Sussex coast. The weather has been varia- 

 ble, with no remarkable circumstances. There were several 

 observations on the clouds which I made by the sea-side, which 

 1 shall take this occasion to mention, as they may be iuterestinj: 

 to the nepheological reader. 



I noticed that the cumuli when over the sea Vt'cre lower down 

 than those over the land at the same time, as if the diurnal va- 

 pour plane extended higher above the land than above the sur- 

 face of tlie ocean. When the same clouds passed over the land, 

 they seemed to rise somewhat higher. Among the colours which 

 the clouds refracted on difrerent occasions, but particularlv with 

 east wind, I noticed the frequency of a sea-green tinge in the 

 cirnis and other light clouds. I have seen this before on land, 

 though less frequently than in maritime situations. The first 

 impression on my mind was, that the evaporation of sea-v/ater in 

 which some salts might ascend, might possibly be the cause of 

 the glaucous colour of the cloud. I think, however, it must have 

 been owing to some peculiar refractive power originating in the 

 structure of the cloud, and not to any colouring matter ; as it 

 was only in certain situations in respect to the setting sun that 

 the green colour was seen. Some small meteors or falling stars 

 of the common kind have happened in clear nights with east 

 wind. After some days of very clear dry weather, and wind 

 easterly ; on the 19th of September the sky became full oi cirnis, 

 cirrocumiilns, and cirrostrafus, with rain 'at night. The 20th, 

 21st, and 22d, warm, and wind SW, and gentle showers. This 

 tvening (the 23d) we have had a tiumder shower about nine. 



Clapton, 



Sept. 23, 18J4. Thomas Forstkr. 



P. S. — I shall be obliged to any of your correspondents who 

 can favour me, through the medium of 'the Philosophical Maga- 

 zine, with a scientific account of the luminous atmospheric phae- 

 nomenon mentioned in the Chester newspaper of last week. It 

 must have been a kiiid of aurora barealis. 



Mrnr.oRo- 



