280 ESSAY 



CONCLUSION. 



i 



The experiments which were made by me 

 on dew, and other subjects treated of in the 

 preceding Essay, were unavoidably attended 

 with many inconveniences, which were the 

 more felt, as my health had long been feeble, 

 and as my professional duties obliged me often 

 to return to London in the morning, without 

 having previously taken rest, after the whole' 

 of a night had been spent in attending to the 

 objects of my pursuit. The inconveniences 

 here alluded to were, indeed, so great, that I 

 was twice or thrice obliged to intermit my 

 labours for several months together, and at 

 length found it necessary to cease from them 

 entirely, before I had nearly completed the 

 plan, which I had formed. I take the liberty 

 of mentioning these things, to excuse, in part, 

 the imperfections, which will be observed in 

 what I have written, as some of them would, 

 no doubt, have been removed by a further in- 

 terrogation of Nature *. 



London, September 25, 1815. 



* Of the experiments related in the beginning of the second 

 Part of this Essay, with the view of proving, that the forma- 

 tion of dew is an effect of previous cold in the substances on 



