Miscellaneous Tables, Figures and Notes. 133 



6. Per Cent, of Rays of Light Reflected from Glass Roofs at 

 Various Angles of Inclination. 



(Bouguer. ) 



i '. 2.5 per cent. 



2-5 



2-5 



2.7 



3-4 



5-7 



II. 2 " 



22.2 " 



41-2 



IO U 

 20 

 30 

 40 



50 



60 

 70 



80 



85 



54-3 



Glass in use 

 previous 

 to 1887. 



Area of Glass in Various States and Provinces, 

 Commercial Greenhouse Purposes. 



{Stewart. ) 



in use 

 nous 

 887. 



Alabama 50,000 



Arkansas J 4474 



California 213,660 



Connecticut 



Delaware 79, 100 



District of Columbia . 125,000 



Florida 20,000 



Georgia 33, 100 



Illinois 1,422, 533 



Indiana 142, 866 



Iowa 125, 580 



Kansas 31,600 



Kentucky 320,400 



Louisiana 24,420 



Maine 102,033 



Maryland 185,526 



Massachusetts 1,375,000 



used for 



