The Mickoscopb. 339 



TECH NOLOGY. 



Liquids for Re -moistening Blood. — In his admirable article, 

 "Comparative Studies of Mammalian Blood," published in the 

 Jr. of Comparative Medicine and Surgery, Dr. Henry F. Formad 

 gives the following list of liquids useful in the re-moistening of 

 blood which has become dried, for microscopical examination : 



1. Virchow or Moleschott's liquid : 



Caustic potash 30 to 33 parts. 



Water 70 parts. 



2. Miiller's fluid. 



Bi-chromate of potassium 2 parts. 



Sulphate of sodium 1 " 



Water 100 " 



3. Wilbert's fluid. 



Bi- chloride of mercury 0.5 parts. 



Chloride of sodium 2.0 " 



Water 100 " 



4. Pacini's liquid: 



Water 300 parts. 



Glycerine 100 " 



Chloride of sodium 2 " 



Bi-chloride of mercury 1 " 



5. Ranvier's liquid. (Iodized serum.) 



Potassium iodide 2 parts. 



Iodine sufficient for saturation. 



Water 100 " 



6. Malassez' artificial serum. 



Solution of gum Arabic, sp. gr 1020 



Solution of chloride of sodium, sp. gr . . . . 1020 



Solution of sulphate of sodium, sp. gr . . . . 1020 

 Of each equal parts. 



7. Roassin's liquid. 



Glycerine 3 parts. 



Sulphuric acid 1 " 



Water sufficient to make the liquid of 



specific gravity of 1028. 



