1872.] Dr. F. Crace-Calvert on Prevention of Putrefaction. 189 



Fungi. 

 6. Phosphates. 



Phosphate of soda 17 



Phosphate of lime 22 



Permanganate of potash 22 



8. Tar Series. 



Carbolic acid None 



Cresylic acid None 



9. Sulphocarbolates. 

 Sulphocarbolate of potash . . 



Days required for dere- 

 lopment of 



Sulphocarbolate of soda 

 Sulphocarbolate of zinc 



17 

 19 

 17 



10. 



Sulphate of quinine None 



Picric acid . . 19 



Pepper None 



Turpentine 42 



11. 



Charcoal 



21 



Vibrios. 



13 



7 



None 

 None 



18 

 18 

 None 



25 

 17 

 8 

 14 



In comparing the results stated in the above Table, the substances 

 can be classed under four distinct heads, viz.: — those which prevent the de- 

 velopment of protoplasmic and fungus-life ; those which prevent the pro- 

 duction of vibrio-life, but do not prevent the appearance of fungus-life; 

 those which permit the production of vibrio-life, but prevent the appear- 

 ance of fungus-life ; and those which do not prevent the appearance of 

 either protoplasmic or fungus-life. 



The first class contains only two substances, carbolic and cresylic acids. 



In the second class, also, there are only two compounds, chloride of zinc 

 and bichloride of mercury. 



In the third class there are five substances, lime, sulphate of quinine, 

 pepper, turpentine, and prussic acid. 



In the fourth class is included the remaining twenty-five substances. 



The acids, while not preventing the production of vibrio-life, have a 

 marked tendency to promote the growth of fungus-life. This is especially 

 noticeable in the case of sulphuric and acetic acids. 



Alkalies, on the contrary, are not favourable to the production of fungus- 

 life, but promote the development of vibrios. 



The chlorides of zinc and mercury, while completely preventing the de- 

 velopment of animalcules, do not entirely prevent fungus-life ; but I would 

 call special attention to the interesting and unexpected results obtained in 



