79 



our author's Essay on an " Anomaly presented 

 " by the combination of Potassium and Oxy- 

 " gen, with some general observations on 

 " Combination ;" in IVlay and December, 1825, 

 " on the Solar Spots and Rotation ; 5> and in the 

 latter month, " Observations on the planet 

 " Venus, made during the spring of the year 

 " 1825." In January, 1826, "on finding the 

 " Longitude at Sea ; M and in August, November, 

 and December, in the same year, " Telescopical 

 " Observations on the Moon.' 7 The Philosophi- 

 cal Magazine has noticed, among the articles of 

 intelligence,* some experiments made by Mr. 

 Emmett, in the preceding summer, on Gas, 

 referring unquestionably to the author's letters 

 in the Hull Rockingham, of the 19th April and 

 10th May, 1817, and in the Hull Advertiser 

 of the latter date, on the discovery and illumi- 

 nating power of Oil Gas. The only work 

 which Mr. Emmett has published in a separate 

 volume, is his " Remarks on the late Count 

 " Volney's new Researches into Ancient His- 

 " tory," which appeared in 1823; but he has 

 recently put forth proposals for publishing by 

 subscription, a complete Work on the Mathema- 

 tical Principles of Chemical Philosophy, which 

 we may hope will soon be given to the scientific 

 world. 



- Vol. 49, p. 309. 



