VOL. XIII.] PHILOSOPHICAL TRANSACTIONS. 685 



treats of the heat of human blood freshly emitted; of the inflammability; of the 

 specific gravity; of the volatile salt of human blood, and its figure; of the two 

 oils; of the fixed salt, of the terra damnata; of the proportion of diflfering sub- 

 stances chemically obtained from human blood. 



The 3d part contains promiscuous experiments and observations, about the 

 serum of healthy men's blood. 



The 4th part contains the history of the spirit of human blood begun ; and is 

 a summary of the history of volatile salts in general : under these (secondary) 

 titles. 1 . Whether human blood may be so ordered by fermentation or putre- 

 faction, as that in distillation, a spirit, either urinous, or vinous, may ascend 

 before the phlegm ? 2. Whether spirit of human blood be really any thing, but 

 the volatile salt and phlegm well commixed ? 3. Of the species of saline bodies 

 to which the spirit of human blood is to be referred. 4. Whether spirit of hu- 

 man blood be different from spirit of urine, and other spirits that are called 

 volatile alkalies. 5. Of the quantity of spirit contained in human blood, whether 

 accompanied with its serum, or dried. 6. Of the consistence and specific 

 gravity. 7* Of the odour, taste, colour, and transparency. 8. Of the disso- 

 lutive power of spirit of human blood. Q. Of the tinctures that may be drawn 

 with spirit of human blood. 10. Of the coagulating power. ]1. Of the pre- 

 cipitating power of spirit of human blood. 12. Of the affinity between spirit of 

 human blood and some chemical oils, and vinous spirits. 13. Of the relation 

 between spirit of human blood and the air. 14. Of the hostility of the spirit of 

 human blood to acids, whether they be in the form of liquors or fumes. 15. Of 

 the medicinal virtues of the spirit of human blood applied outwardly, and l(5 

 inwardly. 



After which follows the appendix ; where, among other things, under the 

 title of the several ways of distilling human blood, the author gives an account 

 of his success in distilling three portions of dried blood, each with a different 

 additament, as with quicklime, calcined tartar, and oil of vitriol.* 



END OP VOLUME THIRTEENTH OP THE ORIGINAL. 



* The knowledge which philosophers possessed at this period of time, respecting the nature of the 

 blood circulating in the vessels of man and other respiring animals was, in many particulars, very 

 obscure and incomplete. Modem chemists have shown, and particularly the French chemists, that 

 it is resolvable into a great variety of component parts, some of which it has in common with the 

 other animal fluids, and even with some of the solids ; while others of its component parts are, as a 

 fluid, peculiar to itself. Besides the three distinct animal matters, albumen, gelatine, and fibrine, 

 (diffused in a large proportion of water) it contains a considerable number of salts. To one of 

 these (consisting of phosphoric acid and iron) its red colour is attributable. It also contains a por- 

 tion of sulphur, combined with hydrogen and ammonia. This will account for some of the proper- 

 ties ascribed by Mr. Boyle^ to what he terms the " spirit of blood." 



END OF VOLUME SECOND. 



