808 



Mr. G. T. Bennett on the Parallel Motion of 



having the two sliding pieces in common and the slide- 

 connexion itself entirely omitted. 



Fig. 7. 



A niodel ; of a special form, of the mechanism (h). The four upper 

 pieces all move as in fig. 5. 



Fio-. 8. 





R 



A 







S 



B 





T 



U 



The hinge RS of the model of %. 7 being disconnected, the 

 mechanism flattens out as shown here in plan. 



