ON EXPECTORATED MATTER. 255 



f. When very hot water is used, namely, that of a tera- andTeryhyt 

 p(erature from igo^to 210°, a still greater number of motes ^^'*'^^'"* 

 are perceivable, especially with a lens, and the water is 

 rendered millcy. 



3. Brisk agitation is required, for a due length of time, other kinds . 

 to diffuse the other kinds of expectorated matter through with cold wa- 

 cold water ; but a great number of fibrous and membra- 

 nous pieces appear, the form of which cannot be destroyed, 



or only partially, by shaking, in almost any proportion of 

 water. Three drops of ropy and opaque matter were shaken 

 in half a pint of distilled water. About one half of them 

 was diffused ; the rest of them was in the form of small 

 fibrous, leafy, and irregular figured motes; which, on re- 

 pose, formed a sediment, aad remained in that state three 

 months; although in that time the water became highly 

 f"a?tid, and sometimes in this experiment the sides of the 

 vessel were tinged black. 



4. Agitation of these sorts of expectorated matter (3), And with hot 

 in a large proportion of water at the temperature of 170° ^^ater. 



and, upwards, produced a greater degree of milkiness, and 

 a greater number of small masses, which could not be dis- 

 solved by long shaking. Putrefaction did not take place 

 Ko soon in these mixtures, as in those in cold water. 



5. If the proportion of the last mentioned kinds of expec- M«chanical 

 torated matter be two or three parts to one of cold water, niixiure. 

 or under the temperature of coagulation, a uniform mix- 

 ture may be produced by violent agitation, the water being 

 entangled by the viscidity of the matter, rather than chemi- 

 cally united. 



6. On boiling the mixtures (5), a great part of the expec- This boiled, 

 torated matter is separated in a curdy form from a milky 



li'juid. 



. 7- If less than two grains of expectorated matter were » • r -. 

 " I Aciion oi re*- 



diffused through five hundred grains of water, no evident geiui. - 

 precipitation was occasioned by tannin; while with one 

 grain of isinglass jelly, or white of egg, or of serum of blood 

 S dissolved in five hnndred grains of water, there was an evi- 

 dent precipitation with this reagent. 



8. I could arrive" at no uselul conclusions, for the dis- 

 tinction of expectorated matter from other coauiilablc, or 



fiora 



