weather gets warm, extra ventilation can be given by means 
of the ventilating handle. In really hot weather it may be 
necessary to lightly shade the top glasses with whitewash 
sprayed on with a hand syringe. 
During Winter and Spring, the ends of the P.M.G. rows 
must be kept closed. Use a sheet of glass, wood or asbestos 
and hold it in place with a stake pushed firmly into the ground. 
Tie the top of the stake to the handle of the end P.M.G. in 
the row. 
(g) Hoeing and weeding 
This is easily carried out without moving the P.M.Gs. by 
removing the top sheet of glass, which gives easy access to 
the whole of the soil underneath. One sheet of each P.M.G. 
is removable and takes in and out in an instant without 
reducing the rigidity of the P.M.G. 
(h) Watering 
The secret of successful P.M.G. cultivation is to have spongy 
soil full of humus. In dry weather, the ground should always 
be given a thorough soaking before sowing or planting out. 
It is then unnecessary to lift the P.M.Gs. for watering, as 
water which drains down the glass will soak into the ground 
and seep sideways and downwards to the roots. To assist 
this, small channels can be hoed alongside the rows as shown 
in the diagram. The ground between the P.M.Gs. should 
be kept hoed, as if it is allowed to become caked, water 
which falls on it will run away and never reach the plants 
inside. ) 
WATERING PLANTS GROWING UNDER P.M.Gs. 
CHANNEL FOR WATER 
SOIL FROM 
| CHANNEL 
HOE A CHANNEL EACH 
SIDE OF THE ROW 
AND POUR WATER IN 
SOIL 
bier 
Page Eleven 
