Steam and Hot Watek fok Greenhouse Heating. 171 



EH 



Ci W Tt< iO iO Q CO O G0OQ005t>- 

 *-< OS 00 00 f-i Q 05 05 (7*i-tOOiOO 



Oi 1-1 l-iT-l ©i C^ »-H T-H TH T-H 



comc^wioioi-ic* -r-tcot^coosjo 



CiOJi-'C*«WMi-i-PT-Hr-ir-H-Hi-Hi-l 



a 



<D 

 02 



be 



.a 



13 





<D „ , , g , ^ , 



p^i^ t- ;> 3 b. (. L< 



O 



d a 



3 3 

 •^■^ 

 IS £ 



. - ''H (« 

 fc, t, t, » P 



O) Oj D 0<& 



zo m 'Xi Q_g 



(h 



s 



© 



M Q, 



^a 



■-32 

 !o 



o 



-4 P3DQfe 



qT ^ gT <]5" © 



t» VI ^ m VI 



3 3 3 3 S 



O O O O O 



