DISEASES. 145 



what higher for two or three days. This will cause the 

 sulphur to throw off fumes, which are readily perceptible 

 to the smell, and will check the further progress of the 

 past if present, or prevent its appearance if not so. We 

 have used all the supposed remedies that we could collect 

 a knowledge of, by way of experiment, without being 

 able to discover anything more than temporary relief, 

 while the fumes of sulphur, as above recommended, have 

 never failed to immediately check, and if water be with- 

 held during the continuance, to finally overcome it. There 

 need be no fear of sulphur doing liarm to the foliage ; so 

 long as ignition does net take place, it may be used with 

 confidence. Herein lies the secret. If allowed to burn, 

 chemical action goes on, and sulphurous acid is produced, 

 which in its then gaseous form will speedily destroy all 

 foliage with* which it comes in contact. 



The other kind (Boirytis ?) appears like a fine and 

 delicate hoary mouldiness, and vegetates along the young 

 wood and tender growth of the stem, the leaf stalks, over 

 the surface of the berries, and upper side of the leaves ; 

 enveloping and covering the parts so as to prevent the 

 further progress of the fruit, cause the leaves to fall, and 

 the branches to cease growing. It is not, as in the 

 previous example, confined to late crops, but will attack 

 those started early also, and is often most prevalent when 

 too dry and cold a temperature has been allowed, more 

 particularly if a strong moist heat has been previously 

 kept up ; cold drafts will increase the tendency hence 

 great caution is necessary in ventilating, or the producing 

 of that atmospheric peculiarity which takes place when 

 the moisture that is in solution in the atmosphere becomes 

 condensed by a sudden transition to a lower temperature. 

 Observation will show that those forms of fungus which at- 

 tack peas, gooseberries, &c. and the kind now spoken of is 

 7 



