42 Joty—On the Conservation of Mass. 
(5). Jan. 27th, noon.—CuSO,, 25 grms.; H,O + H.SO,, 25 c.c. 
Readings: 45, 55, 65, 73, 80, 86, 90, 92, 93, 92, 90, 86, 83, 78, 74, 70, 63, 
57, 51, 44, 38, 82, 25, 19, 18, 8, 3, 1, 5, !, 9, 14, 18, 22, 27, 29, 80, 30, 29, 28, 25, 
22, 18, 18, 8, 8, 2, 9, 17, 28, 82, 41, 50. 
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About 30 seconds after the complete descent of the liquid, the curve shows that 
the slow easterly motion of the beam ceased, and a westerly drift began. <A 
force acting in a westerly direction, and generated during the solution, would 
occasion such an appearance. 
(6), Jan. 28th, noon.—CuSO,, 25 grms.; HO + H.SO,, 25 ¢.¢. 
Readings) 35) 0995 lillian 1414 Sols SL LOMO monn, Omemo elon Os 
2h, 28, 82, 8h, 85, 37, 87, 87, 37. 
Called away at this point, and on return in fifteen minutes, I found that the 
load had continued its motion westward, and the beam was now at rest against the 
westerly stop. A very slight flattening of the curve towards the west is per- 
ceivable after the complete descent of the acidulated water; finally, the motion is 
westerly. 
