SEQUELA CARTARUM; 



SITE 



INQUISITIO LEGITIHA DE CALOEE ET FEIGOKE, 



Sectio Ordinis. 

 Oarta Suggestionis, sive Memoria Fixa. 



THE sun-beams hot 1 to sense. 



The moon-beams not hot, 2 but rather conceived to 

 have a quality of cold, for that the greatest colds are 

 noted to be about the full, and the greatest heats about 

 the change. 3 Qu. 



1 Spelt whott in MS., and so throughout. 



2 Compare on this point Vol. I. p. 358. and Vol. II. p. 373. Since Mr. Ellis's 

 notes on those passages were in type, a more decisive ex eriment appears 

 to have been made as to the calorific property of the moon's rays. In Mr. 

 C. Piazzi Snwth's " Notes of Proceedings during the Astronomical Expe- 

 dition to Teneriffe," date 14 Oct. 1856, I find the following paragraph: 

 " Happier was the enquiry into the radiation of the moon, by means of the 

 Admiralty delicate thermomultiplier, lent by Mr. Gassiot. The position 

 of the moon was by no means favourable, being, on the night of the full, 

 19 deg. south of the equator; but the air was perfectly calm, and the rare 

 atmosphere so favourable to radiation, that a very sensible amount of heat 

 was found, both on this and the following night. The absolute amount 

 was small, being about one-third of that radiated by a candle at a distance 

 of 15 feet ; but the perfect capacity of the instrument to measure smaller 

 quantities still, and the confirmatory result of groups of several hundred 

 observations, leave no doubt of the fact of our having been able to measure 

 here a quantity which is so small as to be altogether inappreciable at lower 

 altitudes." 



8 The last clause is omitted in the Novum Organum. 



