No. :>:i lot. 



Auxiliary Apparatus for Air Pumps. Bellows. Compression Pump. Air Wheels. 



407 



53087. 1 : 5. 



53089. 1:8. 



53096. 1:8. 



53099. 1:5. 



53091. 1:7. 



53101. 1 : 6. 



53102. 1 : 6. 



s. d. 



53.089. Model of Compression Pump, Figure, with rubber ball 0. 12. 



53.090. Sectional Model of a Compression Pump (Kleiber, Oberstufe, Fig. 241) 1. 5. 



53.091. Compression Pump after Silbermann (M. P. I, Fig. 553 [851]), Figure . . . . 4.16.0 



The pump has a massive iron base, being provided with two valves and three stopcocks. It 

 admits of compressing to 6 atm. 



53.092. - - idem, with manometer 6. 0. 



Gasometers and Aspirators, see under Nos. 51,244 51,277, pp. 211 213. 



53.094. Compression Apparatus after Pouillet (M. P. I, Fig. 493 [534]), with compression 



screw and hand-wheel, for demonstrating the deviations from Boyle's Law 17. 0. 



The apparatus has two tubes of 2 m length, also rule, and is tested at 130 atmospheres pressure. 



53.095. - - i d e m, with bevel gearing 20. 0. 



53.096. Air Reaction Wheel, Figure (W. D. Fig. 178 [163]), of glass, with brass holder 



and base, for blowing by the mouth 0. 6. 



53.097. - - i d e m, entirely of metal 0. 8. 



53,058. Air Reaction Wheel for the Air Pump, see Fig. 53,058, p. 404 0. 3. 



."3.099. Gas Reaction Wheel, Figure, for driving with house gas or under the air pump 

 receiver. When worked with gas the neck of the flask is half filled with water; the 

 house gas flowing out is ignited (Fr. phys. Techn. I, 2, Fig. 3690) 0. 6. 



52,593. Repulsion Apparatus after Hartl, see Fig. 52,593, p. 352 1. 4.0 



53,101. Steam Reaction Wheel (Heron's Rotating Ball) of glass, in iron stand, Figure 



(Fr. phys. Techn. I, 2, Fig. 3691 [I, Fig. 641]) . . . 0. 5. 



53.10:.'. -- idem, entirely of metal, Figure, with spirit cup 0. 14. o 



C'l. 3797, 5219, 5988, 5519, 

 997, 5872, 999. 



