THE FLOEAL WORLD AND GARDEN GUIDE. 



79 



PEOPAGATLWG CASE. 



{CCORDING to our promise to a correspondent last 

 month, we now give a design of a propagating case 

 which has been found to answer admirably. The figure 

 represents the case in section. A, is a square wooden 

 box lined with zinc ; it is twenty inches square and one 

 foot high. B, is a zinc frame, perforated with small holes. C, a tin 

 or copper pan for water. D, a lamp with four burners, colza oil 



OTououora 



v-''.-.---r-T>r-B .!\- 



PROPAGATING CASE. 



being preferred to any other. E, a diaphragm of zinc to confine the 



heat to the water, the space within D, where the flame of the lamp 



plays being filled with heated air causes the boiler to be heated 



over the whole of its under surface. F, is a funnel for filling the 



boiler. G, a zinc frame fitted with glass, the whole of which can be 



lifted off at pleasure. The sides of the box are perforated with holes 



to admit air for the combustion of the 



lamp, as shown at H. The lamp is 



pushed into the centre of the space 



below by means of the grooves I, and 



when the case is at work it lias the 



appearance shown in the following 



small outline engraving, where it is seen 



that the side of the lamp is closed 



with a door, which should bo of glass, 



in '>rder that the operator may readily become aware whether or not 



the lamp is burning properly. 



March. 



