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Method of boltlBir^tte vwA tM mw 

 Ko-coiM>eff kftiMMr. 



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Isn't it so, that' next to boiler gntM ^ 

 that stick, the rentilating appsratos 

 in a greenhouse comes in for the bulk 

 of the swearing? 



Isn't it also so, thai it's not because 

 most yentilating apparatus as a whole 

 is not right, but that so many of the 

 little things about it are wrong? 



Take the question of fastening the 

 rods to the bottom of the ridge yent 



4MSh. 



ylf s no unusual thing to hear of the 

 wind ripping the screws out and flop- 

 ping the sash and breaking all tiie 

 glass. Or tearing it oif completely 

 and flinging it through the roof. 



Admittedly, it hasn't happened very Puts of bftU-beuliic sktft ksntfur. 



Ball-bearlns hMMitek boiled to nf t<>r 

 and showing the sufUBS. in pItMX. 



oifiten; but it'r dot ffrijtlea^t possibil- 

 ity to haye hiitiiging oyeryoUv To orer- 

 oome it. we Jiare for seyeral years 

 boh^ the fiMtoQ^rfl^i^the sashr rail. 

 Put two bolts stniight through the 

 wood. ^ 



Considering th& fact that a bouse 306 

 feet long reQulres bolts jat a cost of 

 $6.70 for l^em all, against screws 

 costing tl. 25. it shows yon one of the 

 reasons why our houses sometimes 

 cost more titan some oUiers. 



Another thing about our ventilating 

 apparatus is that we equip it with 

 frair-6«<n^-8haft hangers. You know 

 what that means in making it work 

 easier. 



mvff<GTON 



NMrYork 



BOSTON 

 UdeBUs. 



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'otiGre— ihpw w aiidtCoiMarvatCMtes 



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Irvington. N. Y. 



TOttONTO 

 RoyelBMikBUs. 



DasPUiaM.10. 



St. CiAufawa. CNiL 



CHICAGO 

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