Tht Colored Plates illustrating this edition of the work, requiring great car* 

 in pHnting, were executed in London. 



SPECTRUM ANALYSIS, 



In its Application to Terrestrial Substances, and the Physical 

 Constitution of the Heavenly Bodies, 



Familiarly explained, by Dr. H. Schellen, Director der Realschule 

 I. 0. Cologne. Translated from the second enlarged and revised 

 German edition, by Jane and Caroline Lassell. Edited, with 

 Notes, by William Huggins, LL. D. With numerous Woodcuts, 

 Colored Plates, and Portraits ; also, Angstrom's and Kirchhoff 's 

 Maps. 455 pages, 8vo, cloth. Price, $6.00. 



From the CJiemical News. 



"This admirable work does credit to, or should we say is worthy of the 

 author, the translators, and the editor. The first part treats on the artificial 

 sources of high degrees of heat and light ; the second on Spectrum Analysis 

 in its application to the heavenly bodies. We must approve the method fol- 

 lowed in the translation, and by the editor. In many translations the views 

 of the author are suppressed, in order that the views of the translator or 

 editor may be expounded; but here Dr. Hoggins, however leniently such a 

 fault might have been looked upon with him, has permitted the author's 

 views to remain intact, clearly stating his own and wherein Ues the differ- 

 ence." 



From tJie Chicago Post. 



" The object of this volnme is to introduce the general reader into a new 

 realm of science, and acquaint him with the particulars and tlie results of 

 the most brilliant discovery of the present century. Whoever has an appre- 

 ciative sense of the beauties and wonders of Nature, illuminated by science, 

 will find this volume a rich mine of enjoyment which he will do wisely to 

 explore." 



From, the Philadelphia Age. 



" The contents are formidable in appearance, but the average reader will 

 find its exposition easily intelligible. To many the revelations of this book, 

 80 marvellously minute, and vet so unerringly accurate, will be as wonder- 

 ful as the stories of the ' Arabian Nights.' " 



From the Boston Globe. 



" Certainly, as regards mere knowledge, the Spectrttm Anai,tsis has let 

 us into many secrets of the physical universe, which Newton and La Place 

 would have declared impossible for man's intellect to attain. The science 

 is still in its infancy, but it is prosecuted by some of the ablest, most pa- 

 tient, and most enthusiastic observers, and some of the keenest thinkers, 

 at present existing on our little, insignificant physical globe." 



D. APPLETON & CO., Publishers, 



549 & 551 BROADWAY, N. T. 



