CONTENTS. V 



Part II— Chapter III— Continued. p^ ^ 



Infra-red emission spectra of gases in vacuum-tubes 308-319 



Cleveite gas _ ^ ^ 



Water vapor 311-31^ 



^y^'"°°^" 312-313 



Oxygen ^^^ 



Carbon dioxide •? n--? 14 



Carbon monoxide ^i4-'^r'; 



Ethyl alcohol -j_ 



Nitrogen '. ^' '.'.'.'.'.'.'.'.'.'.'.''.'. 316-318 



A'"'"0"i^ 318-319 



Radiation from a vacuum-tube when heated externally 319-321 



Radiation from a black body when heated to 100° C 321-322 



Temperature of gas in the vacuum-tube 322 



Chapter IV.— Theoretical -j^, ,on 



Summary 



ERRATA 



Page 8, first line.— For CaSog, read CaSOi. 



Page 17.— For equation Zi = arc sin (sin <^ x/;^^— sin^ 4— cos <f> sin"Z), 

 read Zi = arc sin (sin <^ s/n^—sin^ Zg— cos <^ sin z,) 



Line 25. — For "emerge from," read "enter". 



Page 59, the ninth line from the bottom.— For CH3 — O— N, read 

 CH3-0-N = 0. 



Page 109, line 7.— For "caymol" read "cymol". 



Page 135, in the third column from the end of the table, the "cor- 

 rected" values are shifted one line. Read i^.id = c).44 /x, instead of 

 I4.id = g.'j fx, etc. 



