380 On the Power of Fluids to conduct Heat. 
- Time 1 TEMPERATURE 
elapsed. °° ~ attop. inthe middle. at bottom. 
i , 88° £ pi ta 51° 
5 min; Me, ——: 54 
te-«: 83 age 56 
£6?°.? “80 72-4 58 
30 76 —. 60 
40 2193 —_—— 61 
50 0 70 —_— 6x 
60° 69 — 61> 
(Air in the room 50°.) . 
Experiment 2. 
The same as before ; only a circular piece 
of wood floated upon the surface of the water, 
on the centre of which the stream of the syphon 
was directed to prevent the current downwards. 
(Air in the room 55%) 
: TEMPERATURE 
Time. at top. at bottom. 
Before the water was poured on .....- 56° 
rs e2°4:06° 56+. 
10 min. 105 56 
20 ie g2 57 — 
3° Bas cate 
40 80 572 
5° 77 58+ 
