HYMENOPHYLLUM TUNBRIDGENSE. 135 
the surface prepared for its reception, sprinkle a little 
more dry sand over the surface, press it all down to- 
gether, give it a good watering, and leave it to settle. 
This is when the Fern is procured in cakes (which may 
he found several yards square), just like a sheet of wad¬ 
ding. If only a few small pieces can be got, then they must 
be very carefully spread over the same prepared surface, 
and imbedded in the sand, pressed down and watered as 
before. When this is done, a bell-glass must be placed 
over the whole, so as to fit just within the rim of the 
pot, and the pot to stand in another pan of water, so 
that two-thirds of the depth of crocks at the bottom of 
the pot may be immersed in water; but the level of the 
water must be below the bottom of the moss. 
