ASTRONOMY FOR 1889, 1890. 



155 



of iron found also in the solar spectrum, li on is followed by nickel, titan- 

 inni,nuin<;an('S(», cliroiuium, cobalt, carbon, with decreasing frequency of 

 (joiucideuces, ending with lead and potassium, for which but one line is 

 found in common with the sun. 



The full list of elements in the sun, ananged according to the inten- 

 sity and the number of lines in the solar spectrnm, is as ibllows : 



Eleincnls ht the ■■^ini, arranf/ed according to the inteiisilij and the number of lines in the 



solar spectrum. 



Aeeordhif) to intensity. 



Ciilciiuu. 

 Iron. 



liydiogen. 

 Sodinni. 

 Nickel. 

 Magnesium. 

 ■ Cobalt. 

 Silicon. 

 Alniiiiiiiiun. 

 Titanium. 

 Clironiium. 

 Mauoaucse. 

 Strontium. 

 Vanadium. 

 Barium. 

 Carbon. 

 Scaudium. 

 Yttrium. 



Zirconium. 



Molybdenum. 



Lanthanum. 



Ni(d)ium. 



Palladium. 



Neodymium. 



Copper. 



Zinc. 



Cadmium. 



Cerium. 



(xliu'inum. 



Germanium. 



Riuxlium. 



Silver. 



Tin. 



Lead. 



Erbium. 



Potassium. 



According to number. 



Iron ('^,000 -f). 



Nickel. 



Titanium. 



Manganese. 



Chiomium. 



Cobalt. 



Carbon (-200+). 



Vanadium. 



Zirconium. 



Cerium. 



Calcium (75 -f-)- 



Scaudium. 



Neodymium. 



Lanthanum. 



Yttrium. 



Niobium. 



Molybdenum. 



Palladium. 



Magnesium (20 -(-). 



Sodium. 



Silicon. 



Strontium. 



Barium. 



Aluminium (4). 



Cadmiunr 



Rhodium. 



Erbium. 



Zinc. 



Copper (2). 



Silver (2). 



Glncinuni (2). 



Germanium. 



Tin. 



Lead (1). 



Potassium. 



Iridium. 

 Osmium. 



Doubtful elements. 



Platinum. 

 Ruthenium. 



Tantalum. 

 Thorium. 



Tungsten. 

 Uranium. 



Bromine. 

 Chlorine. 



Xot in solar spectrum. 



Antimony. 



Arsenic. 



Bismutii. 



Boron. 



Nitrogen (vacuum tube). 



Caesium. 



Gold. 



Indium. 



Mercury. 



Phosphorus. 



Rubidium. 

 Selenium. 

 Sulphur. 

 Thallium. 

 Prea^seody mium . 



Iodine. 



Fluorine. 



Substaiiecs not ijet fried. 



Oxygen. Gallium. 



rellurium. 



Ilolndum. 



Thulium. 

 Terbium, etc. 



Professor Kowland says : " With the high dispersion here used 

 the 'basic lines' of Lockyer are widely broken ui) and cease to exist. 

 Indeed it would be difficult to prove anything except accidental coinci- 

 dences among the lines of the different elements. Accurate investiga- 

 tion generally reveals some slight difference of wave length or a com- 

 mon impurity. Furthermore, the strength of the lines in the solar 



