406 Mr. J. Taylor's Description of a Rain-gauge. 



LXVI. Description of a Rai7i-gauge. 

 By John Taylor, Esq. F.R.S. 8fc. 



[With an Engraving.] 



To the Editors of the Philosophical Magazine and Annals. 

 Gentlemen, 

 T^HE object of this little invention was to construct an in- 

 -*- strument by which the quantity of rain might be regis- 

 tered for a long period, and observed at any shorter intervals, 

 without any manipulation which might require the attention 

 of a person skilful in such matters. 



I wished to place rain-gauges at different stations where 

 machinery worked by water-power was employed, that I might 

 compare the effect of various states of the weather upon the 

 efficiency of the engines ; and 1 was desirous of having an in- 

 strument, of which a common observer could give a correct 

 report, and which would perform correctly, v/ithout any ma- 

 nagement or interference, for a considerable length of time, and 

 which would thus of itself check the reports which might be 

 made at intervals. Others may find uses for such a contri- 

 vance ; and therefore as it seems to answer its purpose very 

 well, I send you a description of it if you deem it worthy a 

 place in your Magazine. 



The instrument has been very beautifully made for me, by 

 Mr. Henry Russell, of King's Square, Goswell-street Road, 

 to whom 1 am indebted also for the arrangement of the train 

 of wheels, and for combining all the parts into a very com- 

 pact and convenient form. 



As Mr. Bevan some time since gave a notice that he had 

 constructed a self-registering rain-gauge, and promised a de- 

 scription of it in your Magazine, I delayed proceeding with 

 mine until he had favoured the public with the account ; and 

 then finding that the principle of his very ingenious instru- 

 ment differed from mine, and that it required so much at- 

 tention as is necessary to keep the clock attached to it con- 

 stantly going, I preferred my own, as being independent of 

 any care of this sort. 



The plate (Plate IV.) shows the rain-gauge in two views: 

 fig. 1. being designed to exhibit how the water is received 



and 



