104 



[Assembly 



COUA^TING HOUSE CALENDER CLOCK. 



Mr. J. H. Hawes, of Ithaca, N. Y., exhibited a clock of his in- 

 vention, designed for the use of counting rooms, banks, railroad 

 offices, pu^'lic houses, &c., which, if it performs all that is claimed 

 for it, will, undoubtedly, prove a valuable acquisition The 

 calender exhibits the year, month, day of the month, day of the 

 week, and the time of day, making the proper number of days in 

 each month, including leap year, with unfailing certainty, and 

 requires no changing or winding during the year. It received 

 the gold medal of the Institute. a. c. 



GWYNNE S CENTRIFUGAL BALANCE PUMP. 



The annexed engravings are views of '' G Wynne's Centrifugal 

 Balance Pump," patented last year. Figure 1 is a vertical trans- 

 verse section. Figure 2 is an outside view of figure I, show- 

 ing the discharge-pipe, D. Figure 3 is an inside view, showing 

 one disc with its radial arms. Fgure 4 is an edge view of the 

 two discs or rotary pistons which constitute the pump when 

 placed inside of the fixed case, figure 2. The same letters refer 

 to like parts. 



