340 



1 . That which is semi-transparent blueish, and of the consistence 

 of jelly. 



2. What is transparent and fluid, as mucilage. 



The 3rd is thick, opake, and straw-coloured, or white, and very 

 tenacious. 



4. Puriform matter secreted without breach of surface. 



5. Matter consisting of the mixture of the 2nd and 3rd, or 2nd 

 and 4th varieties. 



6. Pus from vomicae, arising from tubercles. 



7. Pus from vomicae, consequent on simple inflammation. 



The author next treats more at large of the sensible or obvious 

 properties, including smell, taste, weight relative to water, and ap- 

 pearance under the microscope. 



The next division of the subject includes the agency of heat ; the 

 separation of a coagulum, or curd, at temperatures from 150 to 170; 

 the properties of the curd, and of the residuum which it leaves when 

 burned ; the saline contents of the fluid separated from the curd, and 

 obtained by evaporation. 



Under the same head of agency of heat is also included the pro- 

 cess of distillation to dryness, the properties of the fluid distilled, and 

 of the residuum. 



The action of alcohol is next tried, both on the residuum left by 

 distillation, and also on different kinds of expectorated matter in 

 their fresh state. 



Next follow experiments on the miscibility of these matters with 

 water, and also a set of experiments made with acetous acid. After 

 other miscellaneous experiments, the author concludes, that the va- 

 rious kinds of expectorated matter consist of the same ingredients, 

 but that the proportion of these ingredients is somewhat different ; 

 that expectorated matter consists of water containing certain saline 

 and earthy bodies, together with a coagulable albuminous oxide, 

 amounting in general to between one sixteenth and one twentieth 

 of the whole, but sometimes not exceeding one fiftieth part, and at 

 others amounting to as much as one tenth. 



The saline ingredients are stated to be, 



Muriate of soda, varying from 1 to 2 in 1000 parts. 



Potash, neutralized by animal oxide, 0'4 to 0'7. 



Phosphate of lime, 0'4 to 0*5. 



Ammonia, united probably to phosphoric acid. 



Phosphate, perhaps of magnesia. 



Carbonate of lime. 



Indications of sulphate of lime. 



Vitrified matter, perhaps with silica. 



Oxide of iron in too small proportion to be estimated. 

 The last six substances scarcely amounting to one thousandth part. 



The different consistence is ascribed to the different quantities of 

 albuminous oxide. The thicker matter is also said to be less saline 

 than that which is more fluid. 



The author observes, that all the animal fluids contain potash, but 



