254 



General Mechanics. 



No. 51 783 



51 783. 1 : 15. 



51789. 1:16. 



51790. 1:15. 



51.783. Atwood's Fall Machine, Figure, constructed in the original Atwood form, 

 without pendulum, with polished wood stand; scale divided in 5 cm; total height of 

 machine: 2m 



51.784. --idem, with a seconds pendulum fitted to the stand, in Cardan's suspension and 

 with audible seconds beat 



r> 1.785. - - idem, seconds pendulum with dial and projecting pointer, audible beat . . . 

 51,786. -- idem, with friction rollers, without pendulum 



r>l ,787. - - idem, with friction rollers and seconds pendulum (with audible beat), in Cardan's 

 suspension (Gan.-Man. Figs. 38 45; Gan.-Eein. Fig. 61) 



51.788. Electromagnetic Release for the Falling Weights, Figure, suitable for all preceding 

 machines, very practical 



When this electromagnetic release is fitted the hand release given with the fall 

 machines can be dispensed with. The price of the electromagnetic release is reduced 

 in this case by 8 s. to 16 s. 



51.789. Large Atwood Fall Machine, Figure, with polished wood base on massive iron 

 stand fitted with levelling screws, rule of maple wood divided every 5 cm. Total height 

 of machine: 2 in. With friction rollers, seconds pendulum with audible beat, dial and 

 projecting pointer; also with electromagnetic release, with key and 3 flexible leads; 



: s. d. 

 4.10.0 



6. 5.0 



9.10.0 



10.10.0 



12. 5.0 

 1. 4.0 



Cl. 57(i:>, 4:.s. r.llul. 



