i6 OhjcTvathns on the Ipom^a Hifplda. 



three ftrokes in a minute, and gives about a half gallon into 

 the ciltern at each ftroke. Me adds, " I fpeak of what it 

 did in the drye(t part of laft fiunmer; when it fupplied a 

 large family, together with work-people, &c. with water for 

 all purpofes, in a fituation where none was to be had before, 

 except fome bad w^ater from a common pump, which has 

 been (luce removed. But the above fupply being more than 

 fiiflicient, the machine is occafionally (topped tp prevent 

 wear, which is done by merely cafting off" the ftring of the 

 bucket valve." 



P. S. I have juft been informed that a drawing of the 

 engine, which I had communicated to a perfon in this neigh- 

 bourhood, was fent to a colliery near Swanfea fome months 

 ago, and that it has already been applied to ufe there; it is 

 not, however, fufficiently powerful for the coal-works in this 

 neighbourhood. 



The Jhllotv'mg Cerllfic^Jte accompanied thefe Letters. 

 I do hereby certify, that the water engine, confi:ru6ted near 

 my houfe under the dire(5tion of Mr. Sarjeant, has been eight 

 months in ufe, and fully anfwers the purpofe intended. 



, Edmund L. luTON. 



Irton Hall, March iR, iSor. 



I do alfo certify the above to be true. 



Robert Wilkinson, 



* One ot his majclty's jurticcb of tlie peace 



for the county of Cunibt.rland. 

 Warc'i 13, iSoi. 



IV. Ohfervat'ions on the Ipomaea Hifpida, and fome other 

 Plants of the Famllji of the Convolvulus. By Felix 



FOXTANA*. 



I. X HE tpowa-a hifpida, and other plants of the co«-. 

 I'olvnius kind, have the property, as they grow up, of twift.- 

 inc; themfclves around bodies m the neighbourhood with 

 which they come in contaft. They exercifc this Angular pro- 

 perty on every kind of body, whether vegetable or mineral, 

 great or fmall, even when they are as {lender as a thread. 



II. The fpirals formed by thefe plants are loofe, and at a 

 di fiance from eacn other, when the diameter of the body 

 which they embrace is of a confiderable fize. If it decreafes 

 they become clofer, and approach each other more, in fuch 



• From MJmoirei dc la Socicti MidicaU d' Emulation. Sjtatneme annie. 

 Pdiis i8oi. 



a manner 



