pabsroey: 
Boia 
154 Miscellaneous Intelligence. 
is a 
of the temperature, above that temperature where all kinds 0 
luminous rays occur. So that if T is a certain initial temperature, 
and I its luminous intensity, a a certain increment of temperature, 
then we have the following relation :— 
T + n(a) =n? I, 
The temperature T is so high as to include all kinds of lumin- 
aes 8 
ous rays, viz., 990° C., and the increment ais 46° C. This formula 
the solar temperature. This temperature is 16,000° C., in round 
IV. MisceELtangous Sctentiric INTELLIGENCE. 
1. Flow of Water in Rivers and Canals s by D. Farran? 
Henry, Chief Engineer Detroit Water Works, and late Assist 
ant in the United States Lake Survey.—The greater portion 
flow of the western lakes, and the double float used by Humphreys 
and Abbot in their experimental investigation of the hydraulics 
