38 On the Connexion between the Leaves 



horizontaljlues consti-uctedfor this purpose." Secondly, we would 

 mention as a matter of notoriety, that most of the lead smelt- 

 ing-furnaces in different parts of the kingdom are furnished 

 with such flues, to condense, as far as it can be done, the lead 

 which is evaporated in the process of smelting. 



Such flues as are described in the foregoing paper will, doubt- 

 less, condense the arsenic, and are therefore used in the Tin- 

 burning houses in Cornwall. But we must observe that this 

 substance is not the greatest difficulty to overcome in obviating 

 the evil. The destructive effects, such as they are, are chiefly 

 to be attributed to the sulphur, which is much more abundant 

 in copper ores than arsenic, and is driven off" in a gaseous form, 

 and thei-efore very difficult to condense, and totally out of the 

 reach of such an apparatus as is now described ; unless, indeed, 

 this condensation might be effected, as is suggested by the lime 

 exposed in a new building, and which would ternunate as soon 

 as the mortar was saturated. 



The account is deficient in one respect, it does not allude to 

 a fact which should not have been suppressed. It is, that with 

 a view to accomplish this very object of abatmg the nuisance 

 arising from the Copper-works near Swansea, a reward of 

 lOOOZ. was most liberally offered by the gentlemen having pi'o- 

 perty in that neighbourhood ; and that this and other circum- 

 stances led to the consideration of this subject some time since; 

 and that therefoi'e public attention was drawn to it, and the 

 ingenuity of many was directed towards this object before the 

 Cadoxton experiment was heard of. 



No mention is made of the experiments making by Messrs. 

 Vivian and Sons at their great smelting-works, although they 

 are upon a scale of magnificence, and constructed with such a 

 scientific consideration of all circumstances, as may well be ex- 

 pected to ensure success as far as it is attainable. There is a 

 liberality, too, in Mr. Vivian's proceeding, which cannot be too 

 highly praised in a public affair of this kind; for he not only 

 has declared his intention of not being a claimant lor the re- 

 ward, even if his plan should prove to be die best, but is 

 actually a large subscriber to the sum that is intended to sti- 

 mulate the exertions of others. 



VI. On the Connexion bcfxveen the Leaves and Fruit nf Vcfrc- 

 tables ; "with other physiological Observations. Bij Anthony 

 Carlisle, Esq. F.R.S.* 



In the art of gardening, it must be allowed that the greatest 



value will always belong to special facts, noted down by ex- 



* From the Traubactions of the Londoii Ilonicultiiral Society, 



pericnccd* 



