300 SEALE. 



The window-shell is not exported to anj' extent, the only shipment 

 for last year being 1,458 kilograms sent from Iloilo to New York. How- 

 ever, it is expected that when the builders of bungalows in the United 

 States, especially in California, recognize how miich stronger, cheaper, and 

 more attractive these shell windows are than the same thickness of glass, 

 there will be a brisk demand for them in that country.^' 



■ HOW WINDOW-SHELL IS USED. 



Shell windows are made of naiTow strips of wood usually 13 to 18 

 millimeters wide and 13 millimeters thick, or they may be any size 

 desired. These strips are grooved on two sides and notched every 6.0 

 or 7.5 centimeters as the case may be, to receive the cross stick which 

 also is notched; thus a solid square frame is formed for each shell. 

 After these are put together the entire square is set in a solid frame to 

 fit the window or door. (Plate IX.) 



The following uses are also suggested for the shell : 



Screens. — (Plate IX, fig. 2.) These shells make a most attractive and useful 

 screen, made up either in three divisions in the usual form of the Japanese 

 screen, or else in a single division like the Spanish screen. 



Lights for verandas. — (Plate I, figs. 1, 2, and 3.) These shells make a most 

 durable and desirable light for open verandas, as they lend themselves to a 

 great diversity of forms, the shell being easily trimmed to fit into any form of 

 opening. The old-fashioned lantern shape is a popular form for these lights. 



Old mission shade lights (Plate X, fig. 3) are most attractive and serviceable; 

 they are usually made up with hard-wood frames and large window-shells. 



Conservatory windows. — These shells would be found most desirable by the 

 owners of hot-houses or conservatories in countries where hail is prevalent or 

 where the direct rays of the sun are too strong; they admit a soft light with 

 a fair amount of heat, and the expense as compared to that resulting from 

 breakage and painting or frosting of glass would be almost nothing. 



Fronts to kitchen cabinets. — These ^vindow■shells would make up into most 

 attractive fronts for kitchen cabinets, being easily kept clean and not liable 

 to breakage. 



A dozen other uses might be suggested for window-shells. We can 

 most highly recommend them for almost any purpose to which opaque 

 glass would ordinarily be applied, and I feel confident that, when their 

 cheapness and utility are recognized in the United States, they will be 

 exported in larger quantities. 



T. PHILIPPINE SHELLS USED IN THE MANUFACTURE OF PEARL BUTTONS. 



In addition to the pearl-oyster shells, which are exported from the 

 Philippines in large quantities,^^ there are three varieties of shells found 

 in these Islands and used in the manufacture of pearl buttons. These 



" Names of Philippine dealers from whom window-shells may be obtained in 

 quantity,' can be obtained by applying to the Bureau of Science. 

 "See T^iJs Journal, Sec. D (1910), 5, 87 to 101 (with 6 plates). 



