630 



Heat and Work. 



No. .V, -Jl.'! 



55 249. 1 : 5. 



55 250. 1 : 6. 



55 251. 1 : 7. 



.v>,:M.'3. Gas Engine No. 55,242 with Dynamo, mounted on one baseplate, Figure, with 



glow lamp on stand -!. o. <> 



The generator pves -2 amps, at 12 volts. 



r.U<)l. Steam Reaction Wheel (Heron's Rotating Sphere), of glass, in iron stand, Fig. 53,101. 



p. 407 0. 5. 



:..; loi>. Steam Reaction Wheel, entirely <>r metal, Fig. 53,loi>, p. 407 o. ll.it 



:..VJ14. Aeolipile, \vitli safety valve (Fr. phys. Teehn., I, 2, Fig. 3668) 0. 1S.O 



.V>.L' 15. Model Geyser after Wiedemann, Figure 



:i|>]iar!ilns >h<i\\> t hr ]ilic-nomena of the throwing >i]> of liol water and steam. 



Cl. 1888, 1883, 

 3810, 

 1882, 34'21, IJ'i-. 1 . 



