342 
PROFESSOR TYNDALL ON THE ACTION OF FREE MOLECULES ON 
Name of Liquid. 
43. Iodide of Amyl. 
44. Terebine .... 
45. Cymole .... 
46 Butyric Acid 
47. Butyrate of Amyl . 
48. Caprylic Alcohol . 
49. Valerianic Acid. . 
50. Pure Aniline 
51. (Enanthic Ether . 
52. Valerianate of Amyl 
53. Salicylous Acid. . 
54. Caproic Acid 
55. Nitro Benzol. . . 
56. Kreosote .... 
57. Menthol .... 
58. Chinoline. . . 
59. Eugenol .... 
60. Nicotine .... 
61. Monobromnapthaline 
62. Sebasic Ether . 
Table V (continued). 
Vapours 
Boiling point 
146° 
160° 
175° 
163° 
176° 
180° 
175° 
184° 
188° 
196° 
196° 
205° 
205° 
210 ° 
213° 
238° 
247 Q 
250° 
277° 
308° 
Mean 
Water pressure. 
42 millims. 
39 „ 
38 „ 
Character of sound. 
Weak 
> 
Very small absorptions and very feeble sounds 
at ordinary temperatures. Sounds in most 
cases very strong when liquid is heated to its 
boiling point. 
Table VI. 
Gases. 
Name of gas. 
Watei 
• pressure 
Chloride of Methyl. 
... 350 
millims. 
Aldehyde . 
. . . 325 
9 9 
Olefiant Gas .... 
. . . 315 
99 
Sulphuric Ether . 
. . . 300 
99 
Nitrous Oxide . 
... 198 
99 
Marsh Gas. 
... 164 
>9 
Carbonic Acid . . 
... 144 
9 9 
Carbonic Oxide . 
... 116 
99 
Oxygen. 
... 5 
99 
Hydrogen. 
... 5 
99 
Nitrogen. 
... 5 
99 
Dry air. 
... 5 
99 
Humid air at 50° C. 
... 130 
99 
Sulphuric ether is here inserted with the view of connecting this Table with the 
last. Of all gaseous bodies hitherto examined chloride of methyl is the most energetic 
absorber and the most powerful sound producer. After it comes aldehyde, with a 
