GLA 



[ 420 ] 



GLA 



Grapes 



would have been sufficient if the light 

 were more intense. Taking into con- 

 sideration the consequences of break- 

 age, and other contingencies to be 

 avoided as well as secured, we consider 

 glass of 21 ounces to the square foot, 

 and in panes of 18 inches by 12 inches, 

 the substance and size most desirable. 

 Eough plate glass is desirable, because 

 without diminishing the light it reduces 

 the danger of scorching the leaves. 



GLASS-CASES are of various kinds. 

 One is formed of glazed wooden 

 frames, fitting together, to protect es- 

 paliers, wall-trees, or shrubs, too large 

 to be covered with a hand-glass. 



Another glass-case is made for pro- 

 tecting a single branch. It is thus de- 

 scribed by Mr. Maund, the author of 

 that most useful periodical the Botanic 

 Garden : 



grown on open walls in 

 the midland counties are 

 rarely well ripened; there- 

 fore I provide a small 

 glazed frame, a sort of 

 narrow hand-glass, of the 

 shape shown in the an- 

 nexed outline, to fix 

 against the wall, and in- 

 close one branch of the 

 vine with its fruit and 

 foliage. The open part, 

 which rests against the 

 wall, is thirteen inches 

 wide, and may be of any 

 length required to take 

 |in the fruit. The sides 

 are formed of single panes of glass, 

 seven inches wide, and meet on a bar 

 which may represent the ridge of a 

 roof, the ends enclosed by triangular 

 boards, and having a notch to admit 

 the branch. This is fixed on the 

 branch a month before the vine is in 

 flower, and brings it a week earlier 

 than the exposed. The frame is not 

 fitted closely to the wall, but in some 

 places may be a quarter of an inch 

 from it. The lateral branches being 

 shortened before it is fixed, it does not 

 require removal even for pruning, be- 

 cause I adopt the long-rod mode of 

 training, which is peculiarly adapted to 

 my partial protection system. The tem- 

 perature within the frame is always 



) higher than without, sometimes at mid- 

 day even from 20 to 30. By this 

 simple protection I find grapes may be 

 ripened from three weeks to a month 

 earlier than when wholly exposed, and 

 this saving of time will, I believe, not 

 only secure their ripening well every 

 year in the midland counties, but also 

 that such advantage will be available in 

 the north of England, where grapes 

 never ripen on the open walls." 



Lastly, there is the Wardlan-case^ to 

 cover plants growing in rooms, pre- 

 serving to them uniform moisture and 

 excluding dust. To prevent the dew 

 which is occasionally deposited inside 

 the glass, it is only necessary to open 

 the case frequently, for a few minutes, 

 to render the temperature within simi- 

 lar to that outside. They are not in- 

 tended to exclude the air, and are now 

 made very ornamental. 



GLASTONBURY THORN, a variety of 

 Cratte'gus oxyca'ntlia. 



GLASSWORT. Salico'rnia. 



GLAU'CIUM. Horn Poppy. (From 

 glaukos, greyish green ; referring to 

 the colour of the leaves. Nat. ord., 

 Poppyworts [Papaveracese]. Linn., 18- 

 Polyandria \-Monoyynia. Allied to 

 Eschscholtzia.) 



Seeds, in common borders, in March or April. 



HARDY BIENNIALS. 



G.fla'vum (yellow). 2. Yellow. August. 

 Britain. 



fu'lvum (tawny). 2. Orange. August. 



South Europe. 1802. 



HARDY ANNUALS. 



G. Ara'bicum (Arabian). Red. June. Arabia. 

 1837. 



Pe'rsicum (Persian), l. Red. August. 



Vollynia. 1820.. 



phceni'ceum (purple). 2. Purple. July. 



