40 JoLty—On the Conservation of Mass. 
Experiments on the solution of Copper Sulphate in dilute Sulphuric Acid. 
(1). ELeperiment made at midnight, Jan. 15th—CuSO,, 25 grms.; H,O 25, c¢.¢. ; 
H.SO,, 1:8 grms. 
Readings: 62, 71, 78, 81, 83, 81, 77, 72, 67, 62, 57, 50, 45,!, 40, 34, 27, 20, 
Ney, B), dh, By Ils Oh O, Oy oO B, ah, By B O. 
— BERSERRESSS CELE Te 
FRc SZacwoe SSeS 
eee 
Seenont eartantce souice 
SS 2 ae 
PINGEBC I Led a eens 2a ou 
UL SET ga] | | a 
The load is travelling with almost uniform velocity in an easterly direction 
at the moment of the experiment. There is an almost inappreciable acceleration 
in this direction, which, one and a half minutes after the contact, is rapidly 
checked. A normal vibration would involve now that the beam should swing 
westerly, but it maintains its deflection. A possible interpretation of this would 
be that an easterly force retarded the return-vibration. 
(2). Jan. 17th, noon.—CuSO,, 25 grms.; H.SO, 1:8 grms. ; H.0, 35 ¢.c. 
Readings: 47, 46, 44, 42, 39, 37, 33, 30, 27, 28, 19, 16, 13, 9,6, 3, 2,!, 4, 8 
LS LT Oly GA, 235 OS) OI HO OC OL MOS OO. 
Se SRR ARES eee eee, 
ELUM es Asse ese eee 
tL Tt tf 3 
_ CUS Senn Ses sae eae ee sesh aeee 
SRESERRSSSSEee Seeley 
PRESS eSe eee Sae2 00000 
21S es | a a a a a 
oad ii ee 
eee eee neeeeneee 
Lear | 
susuueeeeee a0 0c ceeegueneeatens 
SRS acess LJ ales 
There is no indication of westerly acceleration in this result. What change 
attends the experiment is rather a very feeble increase of velocity eastwards. 
