54 ALPINE PLANTS 
be maintained by placing the pots of cuttings in a box a 
few inches deeper than the total height of the cuttings and 
covering with a sheet of glass, as shown in the accompanying 
illustration. With such an easily improvised propagator 
the choicest of alpines may be reared. 
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PROPAGATING. 
Handy substitutes for a propagating frame. 
By LAYERS. 
Layering is a capital means of propagating many alpine 
plants. The stronger growing Dianthuses, such as D. 
plumarius, may be layered after the same manner as 
carnations. Our illustration shows a suitable shoot trimmed 
and‘ tongued ’’ for pegging down witha hairpin. ‘‘ Tongue- 
