DEANE'S GLYCERIN JELLY. 245 



crystals. Filter while hot. The index may be brought up to T525 if de- 

 sired, by evaporating the solution somewhat, or by adding more carbolate. 



404. Barff's Boroglyceride (see Journ. Boy. Mic. Soc., 1882, p. 124). 

 This preparation may be obtained (price Is. per bottle) from The Kreo- 

 chyle Company, Viaduct House, Farringdon Street, E.C., or all wholesale 

 chemists. 



405. Glycerin and Alcohol Mixtures. These most useful 

 fluids afford one of the best means of bringing delicate objects 

 gradually from weak into strong glycerin. The object is 

 mounted in a drop of the liquid, and left for a few hours or 

 days, the mount not being closed. By the evaporation of the 

 alcohol the liquid gradually increases in density, and after some 

 time the mount may be closed, or the object brought into pure 

 glycerin or glycerin jelly. 



1. CALBERLA'S LIQUID : 



Glycerin . . . . . .1 part. 



Alcohol . . . . . . 1 



Water 1 



A most valuable examination fluid. As already pointed out 

 ( 2), this liquid is in many cases to be preferred to alcohol 

 for keeping fixed objects in until required for dissection or 

 other further preparation. 



2. I strongly recommend the following for very delicate 

 objects : 



Glycerin 1 part. 



Alcohol . . . . . . 1 



Water 2 parts. 



3. H^NTSCH'S LIQUID : 



Glycerin 1 part. 



Alcohol ...... 3 parts. 



Water 2 



4. JAGER'S LIQUID (quoted from VOGT and YUNG'S Traite 

 d'Anat. comp. prat., p. 16) : 



Glycerin 1 part. 



Alcohol . . . . . . 1 



Sea water . . . . . .10 parts. 



406. Deane's Glycerin Jelly (from FREY'S Le Microscope, p. 

 231). 120 grammes glycerin, 60 grammes water, 30 grammes 

 gelatin. Dissolve the gelatin in the water, and add the gly- 



