ACA 



[6] 



ACC 



vapour of sulphur is fatal to these insects 

 where the air is thoroughly impregnated 

 with it, and the work of destroying them 

 is completed by syringing the infested 

 plants with water, continuing rather fre- 

 quently the operation. This last is the 

 most practical remedy to plants in our 

 borders, unless they can be covered over 

 so that the fumes of the sulphur may be 

 confined, whilst the sulphur is volatilised 

 over a hot-water plate. Potted plants 

 may be submitted to the vapour of sul- 

 phur in a similar way ; but in every 

 instance be cautious that the sulphur 

 does not burn, or you will kill your 

 plants. The vapour of spirit of turpen- 

 tine is said to be as effectual as sulphur. 

 On walls, the best plan is to beat up 

 soft soap in warm water, three ounces to 

 the gallon ; and to add as much finely 

 dissolved clay as will make the whole a 

 thick paint. To this add three or four 

 handsful of sulphur, and keep the mix- 

 ture well stirred whilst applying it. Let 

 it .be daubed on every open space of 

 walling the brush can reach, and if 

 colour is an object, the glaring yellow 

 can be readily subdued by adding plenty 

 of soot, which by some is considered a 

 necessary ingredient. A similar mixture 

 may be daubed over the stems of ordi- 

 nary fruit trees, choosing in this as well 

 as in the former the beginning of April 

 for the operation. Most good gardeners 

 mix a considerable quantity of sulphur 

 with the lime- wash which is applied to 

 hothouse walls. 



A. lioloseri' cem is another species, dis- 

 tinguishable to an unscienced eye chiefly 

 by their scarlet colour. To destroy them 

 there is no plan equal to subjecting them 

 to the vapour of sulphur. 



A. horten'sis. The Garden Mite. Tho- 

 rax ochreous, abdomen white ; has been 

 found upon the roots of the cucumber, 

 upon which it is said to prey. We be- 

 lieve it to be the same Acarus often so 

 abundant upon the root of cabbages 

 affected with the Ambury. 



A. genicula'tus is a minute, brownish 

 red shining mite, congregating during 

 spring in prodigious numbers upon the 

 bark of the plum and other fruit trees, 

 near the base of the small branches, and 

 looking like a gummy exudation. They 

 all injure the plants they infest by suck- 



ing their juices ; and where the fumes 

 of sulphur cannot be applied, as to the 

 stems of trees, and to the soil, we re- 

 commend an application of spirit of tur- 

 pentine, or gas ammoniacal liquor. 



AccLi'MA'TizA'TiON,is rendering a plant 

 capable of yielding the production de- 

 sired from it, in a climate differing from 

 that in which it is a native. In our 

 climate it is usually required to enable 

 a plant to endure lower temperatures 

 than those to which it has been accus- 

 tomed ; and this, though most are in- 

 tractable, is more easy than inducing 

 the natives of colder regions to live in 

 our latitudes. When a new plant arrives 

 from a tropical country it is desirable to 

 use every precaution to avoid its loss, 

 but so soon as it has been propagated 

 from, and the danger of such loss is re- 

 moved, from that moment ought experi- 

 ments to commence, to ascertain whether 

 its acclimatization is attainable. This 

 should be done, because the nearer such 

 a desirable point can be attained, the 

 cheaper will be its cultivation, and con- 

 sequently the greater will be the number 

 of those who will be able to derive 

 pleasure from its growth. Hence it is 

 very desirable that an extended series of 

 experiments should be instituted to as- 

 certain decisively whether many of our 

 present greenhouse and stove plants 

 would not endure exposure to our 

 winters, if but slightly or not at all pro- 

 tected. It may be laid down as a rule 

 that all Japan plants will do so in the 

 southern coast counties of England, but 

 it remains unascertained to what degree 

 of northern latitude in our islands this 

 general power of endurance extends. 

 Experiment, and experiment only, ought 

 to be relied upon ; for we know that the 

 larch was once kept in a greenhouse ; 

 and within these few years such South 

 American plants as Tropce'olum penta- 

 phy'llum and Gesnera Dougla sii have been 

 found to survive our winters in our gar- 

 den borders; the first in Scotland and 

 Suffolk, and the second in Herefordshire. 

 Many tropical plants of every order and 

 species have been found to succeed with 

 much less heat during the day, but more 

 especially during the night, than gar- 

 deners of a previous century believed. 

 Other plants than those already noticed 



