Page:Experimental researches in chemistry and.djvu/130

	Fahr	Atmospheres.
*	0.0	2.48
	0.5	2.50
*	9.8	3.00
*	18.0	3.50
*	21.0	3.72
	25.8	4.00
*	26.0	4.04
*	32.0	4.44
*	33.0	4.50
*	32.0	4.44
*	39.5	5.00
*	41.0	5.10
*	44.0	5.36
*	45.0	5.45
	45.8	5.50
*	49.0	5.83
*	51.4	6.00
*	52.0	6.10
*	55.0	6.38
*	56.5	6.50
*	60.0	6.90
*	61.3	7.00
*	65.6	7.50
*	67.0	7.63
	69.4	8.00
	73.0	8.50
	76.8	9.00
	80.0	9.50
*	83.0	10.00
	85.0	10.30

Arseniuretted Hydrogen.—This body, liquefied by Dumas and Soubeiran, did not solidify at the lowest temperature to which I could submit it, i. e. not at 166° below 0° Fahr. In the following Table of the elasticity of its vapour the marked results are experimental, and the others interpolated:—

	Fahr	Atmospheres.
*	73	0.94.
	-70	1.08
*	-64	-1.26
	-60	-1.40
*	-52	-1.73
	-50	-1.80
	-40	-2.50
*	-36	-2.28
	-30	2.84
*	-23	3.32
	-20	3.51
	-10	4.30
*	-5	4.74
*	0	5.21
*	3	5.56
*	10	6.24
*	20	7.39
	30	8.66
*	32	8.95
*	40	10.05
*	50	11.56
*	60	13.19

---

The following bodies would not freeze at the very low temperature of the carbonic acid bath in vacuo (-166° Fahr.): —Chlorine, ether, alcohol, sulphuret of carbon, caoutchoucine, camphine or rectified oil of turpentine. The alcohol, caoutchoucine and camphine lost fluidity and thickened somewhat at -106°, and still more at the lower temperature of -166°. The alcohol then poured from side to side like an oil.

Dry yellow fluid nitrous acid when cooled below 0° loses the greater part of its colour, and then fuses into a white, crystalline, brittle and but slightly translucent substance, which fuses a little above 0° Fahr. The green and probably hydrated acid required a much lower temperature for its solidification, and then became a pale bluish solid. There were then