BRIDGMAN. — THERMODYNAMIC PROPERTIES OF LIQUIDS. 17 



Isohutyl Alcohol (Eimer and Amend). 

 7% boils below 105.8° C. 

 17% boils between 105.8° and 107° C. 

 76% " " 107.0° and 107.2° C. 



Thus 93% boils within 1.4°, a good sample. 



Amyl Alcohol (Kahlbaum, Free frovi Pyridin). 

 7>% boils below 128.9° C. 

 89.5%, boils between 128.9° and 129.9° C. 

 7.5 boils between 129.9° and 130.0° C. 



Sample free from foreign organic matter and neutral to litmus. 

 An excellent example. 



Ethyl Ether (Kahlbaum, " Sp. gr. 0.720"). 



The whole sample boiled between 34.5° and 35.0° C. 

 Neutral to litmus, free from aldehydes, and sulphur com- 

 pounds. 

 Contained some water, and without doubt some alcohol. 



Acetone {Eimer and Amend. Marked "Pure"). 

 70.6% boils between 56° and 57° C. 

 19.4%o boils between 57° and 58° C. 

 10% boils between 58° and 59° C. 



The sample left a dark brown residue in the distillation flask, 

 probably aldehydic in nature. Free from water, and neutral 

 to litmus. A fair sample. (The brown color developed on 

 standing; at the time the experiment was performed, the 

 liquid was perfectly colorless.) 



Carbon Bisulphide {From the store room of the Chemical Laboratory). 

 5% boils between 45.8° and 46.° C. 

 95 boils at 46.0° C. 



The sample was free from hydrogen sulphide, sulphuric and 

 sulphurous acids, but contains some foreign organic sulphur 

 compounds and left a yellowish residue. The latter always 

 results upon allowing the liquid to stand, especially upon 

 exposure to light. (Here again the color had developed upon 

 standing during the nine months. At the time of the experi- 

 ment the liquid was perfectly colorless.) 



Phosphorus Trichloride {Eimer and Amend). 

 True boiling point is 78.3° C. 

 Sample showed no constant boiling point. 

 6.5° boiled below 77° C. 

 11.2% boiled between 77° and 79° C. 

 17.9% boiled between 79° and 80° C. 



