Tools and Conveniences of the Year, 



carried around three sides of the ventilator sash." — American 

 Florist, October 15, 115. 



Ventilator-Shaft Support. — (Fig. 31.) A device used in 



the houses of C. S. Price, 

 Lansdowne, Pa., to les- 

 sen and lighten shafting 

 bearings. The iron col- 

 umns supporting the roof 

 are cut in two and pro- 

 vided with a four-way 

 tee, through which the 

 shaft runs. "This tee is 

 1% inches one way to connect with the i^-inch column, and 

 1 inch the other way, — the shafting being of i-inch pipe, — the 

 threads are reamed out 

 the 1 -inch way, thus giv- 

 ing shafting room to re- 

 volve easily. ' ' — A merican 

 Florist, August ij, 10. 



Automatic Ventila- 

 tor. — (Fig- 32, page 186.) 

 "First, there is a frame of 

 wood, strongly built, B B 

 H. * * In the hollow 

 thus formed are placed the 

 ends of elliptic-shaped 

 springs made of heavy 

 zinc. * * These springs 

 are bent and their ends, 



after lapping at the center of the upper part, are riveted to- 

 gether." When the house becomes warm the zinc expands 

 and the springs open, "pushing up the pin H, which in its 



turn pushes up the lever 

 C, which working the same 

 on E, turns the shaft D ' ' 

 and raises the sash. "The 

 shafting of this device is 

 made of ordinary ^-inch 

 gas-pipe resting on brack- 

 ets, fastened to the back 

 FlG - 3I - wall with staples."— Z. Z. 



Fsenhower, in Popular Gardening, January, yj. 



-12. 



