356 CONTRACTION OF WAtElt BY UtiAl. 



enable them to overcome the obftacle arifing from inertia and 

 tenacity, and to withftand the arresting effects of atmofpheric 

 heat. 



Though thefe experiments, and fome others of a fimilar na- 

 ture, carried conviction to my mind, and perfectly fatisfied me 

 refpecling the reality of the anomaly of water, I determined to 

 Vary fomewhat the mode of making the experiment, fo as to 

 obtain frill more ftriking remits. 

 Another ex- For the fifth experiment, I ufed an apparatus which confifted 



SliSr^* 8 ° f a mi1 taIIer J ar * II was 2I inches hi g h ' and 4 m d'am^ter. 

 ai inches high. I adjufted at the middle of its height a perforated bafon of tin- 

 ned iron, 2 inches in depth, and 10 in diameter. As this bafon 

 embraced the middle of the jar, I could, by filling it with 

 hot water, or a frigorific mixture, apply heat or cold to the 

 middle portion of the fluid in the jar, and thence, by the ther- 

 mometer, learn what courfe the heated or cooled fluid mould 

 take. 

 Exp. 5. The Exp. V. I filled the jar with water at 32°. I placed it 

 Jaft mestioned U p 0n feveral folds of thick carpet, previoufly cooled to the 

 with ice-cold ^ ame degree. Tbe air of the room going from 33° to 35°, 

 water. Heat I introduced two thermometers, as in experiments firft and 

 xmt^oi two fecond. I then poured water of temperature 68° into the 

 inches near the bafon, and by means of a fpout arifing from the fide of it, 



»iddie by means and f vp i, 6 fr conne aed with a refervoir of water at the 



of warm water * * 



in a circumam- temperature now mentioned, I renewed the contents of the 



kient xefFel. bafon frequently, but without caufing any agitation. 



Thetemperature At commencement, 32°. 



rofe below to 16 , ,„ 



but remained ln 10 minutes, 



mnchanged at ■— 1 5 " ■ " 



top : but after __ nr\ . 



the lower water 



had attained 39** — 25 



5t became fta- gQ | 



tionary, and the 

 temperature at — 38 

 top foen rofe to , 45 



** -50 



— 55- 



— 60. 



Nothing ean be more decifive with regard to the queftion 

 in difpute, than the particulars of this experiment. Heat is 



applied 



