1864.] 



Prof. Guthrie on Drops, 



449 



is one, a continuous stream of liquid by no means implies a faster delivery 

 of it than may be achieved by a succession of drops. On the contrary, 

 just as by walking more rapid progress may be made than by running, so 

 may dropping deliver more liquid than passes in a stream. A uniformly 

 rapid series of drops may be converted into a stream, and reconverted into 

 drops under certain restrictions, at pleasure, without altering the quantity 

 of liquid delivered. We shall return to this point. 



Table II. — Cocoa-nut oil. 



T=28°-7 C. 

 Radius of ivory sphere =22*1 millims. 



Number 

 of drops. 



Time between fall 

 of first but one and 

 last drop. 



Weight 

 of drops. 



Number 

 of drops. 



Time between fall 

 of first but one and 

 last di'op. 



Weight 

 of drops. 







gramme. 







gramme. 



60 



26 



4-5212 



60 



38 



4-3678 



60 



26 



4-5173 



60 



38 



4-3628 



60 



26 



4*5265 



60 



38 



4-3682 



60 



26 



4-5316 



120 



76 



8-7403 



60 



30 



4-3676 



! 60 



38 



4-3646 



60 



30 



4-3668 



60 



42 



4-2342 



60 



30 



4-3593 



60 



42 



4-2357 



60 



30 



4-3665 



60 



42 



4-2362 



60 



34 



4-4827 



60 



42 



4-2368 



60 



34 



4-4731 



60 



42 



4-2330 



60 



34 



4-4643 



60 



42 



4-2378 



60 



34 



4-4779 



60 



46 



4-1487 



60 



34 



4-4681 



60 



46 



4-1438 



60 



34 



4-4752 



60 



46 



4-1499 



60 



38 



4-3778 



60 



46 



41471 



From this Table is constructed the following Table III., which shows gt 

 in seconds and the corresponding drop-weights in grammes, the latter 

 values being the mean of the results in Table II. gt is got by dividuig 

 the time-lapses of Table II. by the number of drops. 



Table III. — Cocoa-nut oil. 

 T = 28°'7 C. 

 Radius of ivory sphere =22*1 milhms. 



gt. 



Mean weight of 

 single drop. 





grm. 



0-433 



007540 



0-500 



0-07275 



0567 



0-07456 



0633 



0-07281 



0-700 



00/059 



0-767 



0-06912 



1-000 



0-06628* 



♦Table I. T = 28°-5C. 



