TABLE 2.

Primary data considered for dilute-gas analysis

1st author	No. of Data	Uncertainty (%)	T range (K)	Density (kg m−3)
Perkins7	1129	2–3	218–751	0.8–47.8
Li24	14	1.6	324	3–38
Millat25	4	1	308–426	0
Johns26	3	1	380–470	0
Imaishi27	1	0.5	301	0
Scott28	19	1	301–349	5–48
Clifford29	1	0.5	301	0
Snel30	3	1	293–323	0
Bakulin32	7	5	400–1000	0.1–0.2
Bakulin33	28	5	225–316	2–49
Haarman34	8	1	328–468	1.1–1.6
Le Neindre35, 36	78	2–3	296–961	0.7–50
Le Neindre37	37	2–3	298–951	0.6–1.8
Le Neindre38	7	2–3	296–309	1.7–46
Michels39	20	1	298–348	1.6–49
Keyes40	2	5	207–273	2.0–2.5
Keyes41	6	5	273–423	1.3–38
Lenoir42	5	2	314–340	1.7–40
Keyes93	5	5	223–473	23–48
Johnston43	14	1–5	186–380	0.02–0.04
Dickins44	6	1	285	0.03–0.2