316 REPORT— 1864. 



Sexitemler 29, 1863. 



At 8" 4"" a.m., at 6321 feet. Gas cloudy. 



At 8'^ 22° a.m., at 8726 feet. Gas getting clearer. 



At 9'^ 1" 15^ a.m., at 12,926 feet. Gas clear. 



January 12, 1864. 

 At 2" 41"' 30' p.m., at 6650 feet. Gas opaque. 



April 6, 1864. 

 At 4*' 25° 30' p.m., at 6163 feet. Gas clearer. 



June 20, 1864. 



At 6" 24" p.m., at 3086 feet. Gas thick and cloudy, and issuing from the 

 neck of the balloon. 



At 6" 35° p.m., at 3002 feet. Gas clear. 



At 6'' 35° 15' p.m., at 2840 feet. Gas bright. 



At 6" 40™ p.m., at 2990 feet. Gas clear. 



At 6" 47° 30' p.m., at (3886) feet. Gas much cloudier, and issuing from 

 the neck of the balloon. 



At 6*^ 48° p.m., at 4013 feet. Gas thick. 



June 27, 1864. 

 At 8" 43° p.m., at 1836 feet. Gas clear. 



The Lines in the Spectrum. 



Septemler 29, 1863. 



At T" 59° a.m., at 5314 feet. The lines B to G in the sky spectrum visible. 



At S^ a.m., at 5473 feet. The line F is beautifully defined ; cannot see A, 

 and can just see G ; sky spectrum. 



At 8'' 6° a.m., at 6385 feet. Can see B to G, sky spectrum. 



At 9'' 14° a.m., 14,096 feet. Spectrum everywhere, B to G, F very dis- 

 tinct; sky spectrum. 



At 9'' 22° a.m., at 13,695 feet. Sun spectrum, H clear, dark beyond. 



At 9" 23° a.m., at 13,695 feet. Sun spectrum, A clear. 



At 9'* 25° a.m., at 13,982 feet. Lines clear and numerous in the sun 

 spectrum, extending from A to beyond H. 



At 9*" 41° a.m., at 14,203 feet. The sun spectrum extended from A to far 

 beyond H, and was very beautiful. 



At O** 43° a.m., at 13,897 feet. Line H in the spectrum clear and vivid. 



At 9** 44° a.m., at 13,897 feet. The sun spectrum very vivid and very 

 long ; H made up of fine lines. 



Odoler 9, 1863. 

 At V" 7° p.m., at 3272 feet. Faint spectrum on all sides. 



