no THE POPULAR SCIENCE MONTHLY. 



that the French astronomer Janssen, then in India, had made the same 

 observation two months before. The independence of these discov- 

 eries was recognized, and the French Academy struck a joint medal 

 in honor of them. 



Mr. Lockyer has prosecuted his spectroscopic researches on the sun 

 with great industry and fruitful results, and, in conjunction with Prof. 

 Frankland of the Royal School of Chemistry, has made a series of in- 

 teresting experiments on the relation of gases under pressure to the 

 spectrum lines, thus throwing important light on the changes taking 

 place in the solar atmosphere. 



Mr. Lockyer's contributions to scientific literature, as an author of 

 books, a periodical writer, and a scientific editor, have been numerous. 

 In 1862, he had editorial charge of the scientific department of The 

 Reader, and subsequently edited the English edition of " The Heav- 

 ens," by Guillemin. In 1868, he published his excellent school treatise 

 on " Elementary Astronomy," and in 1869 became the editor of Nature, 

 when that able scientific paper was established by Macmillan & Co. 

 Last year " The Forces of Nature," an elaborate work, by the author 

 of " The Heavens," appeared, with amendments and additions from his 

 pen. He has published, during the present year, an excellent little 

 volume on " Spectrum Analysis," being a course of lectures delivered 

 in 1869, and revised to date. It is beautifully illustrated, and forms 

 the first of Macmillan's " Nature Series." 



In 1870, he was appointed by the English Government chief of the 

 expedition sent out to Sicily for the purpose of observing the solar 

 eclipse, and, in addition to his other work, accepted the secretaryship 

 of the Royal Commission on Scientific Institutions and the Advance- 

 ment of Science. In 1871, having been named assistant commissioner, 

 he was requested to draw up a report on science-teaching in English 

 and Continental schools, and the same year he received the honorable 

 appointment of Rede Lecturer at Cambridge. 



Mr. Lockyer is a gentleman of courteous and affable manners, a vi- 

 vacious conversationist, and a ready and fluent public speaker. Like 

 many other scientific Englishmen, he recognizes that he owes a duty 

 to this country, and hopes to be able to discharge it when he can get 

 release from his multifarious engagements. He has been invited by 

 the Lowell Institute to give a course of astronomical lectures in Bos- 

 ton, and, when he comes to deliver them, he will probably repeat the 

 series in some of the other cities of the country. 



