208 SCIENTIFIC NfiW*. 



Experiments on ne ^s on its axis, and became (mailer and /mailer. After 34 of 

 evaporation 35 feconds it difappeared with noife. A fecond drop which 

 fell into the fame ladle now fomewhat cooled, difappeared in 

 nine or ten feconds j. laftly, a third difappeared in three fe- 

 conds. When the fpherule of water in the white hot ladle 

 was touched with a cold body, it difappeared in an inftant. 



Klaproth has repeated thefe experiments in the following 

 manner. He took a highly poliflied iron ladle which he heated 

 to whitenefs, and threw therein a drop of water, which be- 

 came divided into feveral globules of different fizes, and foon 

 united into a tingle fphere; As foon as this globule which 

 exhibited the phenomena before defcribed, had difappeared, 

 he let fall a fecond, after which a third, &c. and he obferved, 

 that the duration of each was lefs the more the ladle was 

 cooled. The following is the refult of two experiments. In 

 the firft experiment the intenfity of the heat being greater than 

 in the fecond, the degree at which the water moft fpeedily 

 evaporates happened later. 



lft Experiment. feconds. 2d Experiment. feconds. 



The firft drop lafted 40 The firft drop lafted - - 40 



The fecond - - - 20 The fecond - - - - 14 



The third - - - 6 The third 2 



The fourth - - - 4 The fourth - - - - 1 



The fifth - --- 2 The fifth 



The fixth - - - 



Thefe experiments require to be made with much care. 

 M, Klaproth obferves, that the flighted circumftances produce 

 variations in the duration of the drops. 



Seven drops having been fucceffively thrown into the ladle 

 heated to the neceflary degree, foon united into a globular 

 mafs, which began its movement by a very rapid rotation. 

 This mafs afterwards divided at top, when a fpot of white 

 froth was feen at the upper part of the ball, and its edges ap- 

 peared indented. 



This experiment was made with ten drops, and afforded the 

 fame refult; but when a greater number was employed, the 

 mafs was unable to preferve its rotatory motion, and the whole 

 of the water difappeared with a hiding noife. 



If inftead of the iron ladle or fpoon, a capfule of pure filver 

 or of platina heated to whitenefs be ufed, the appearances are 

 nearly the fame, but thedurationof the balls is commonly longer* 



