BotUmdey. 
PhxL.Trane. 1887. A. Plate 25. 
Jiuxgrcun, showing emission, of heout out, \'<xmu s pressures &c bernperoubures. The, Curves our'e drcuA/n, forthevou- 
.rioius pressures which, are rruxrked, ou, thueur eoctrernttuee. 
Tim, points surrounded, by dotted, circle.?, are, points on, blue, Curve, y = ou(T 4 —Tf) (Sbefouhs loavj; ou.bevnp chosen, 
to rruoukc, y=o for T= T '- 213 + 7 5 Sc to rruaht y. correspond, -with, ou second, -wetb esboubhoshtd, exxperirntnbod, point 
on,, rroy emcsston, curves out, hough, varuxom. 
Wesfc,Uevva7lsu^X:.C , ? Jith. 
