V31.1 VARIOUS FORMULAS GGS 



31.1 Frey 1877a Frcy 1877, 111 



formula: water 100, load acetate 30, potassium chromatc 14 



preparation: Dissolve lead acetate in 50 water. Dissolve potassium chromatc in 50 

 water. Add to acetate solution slowly and with constant stirring. 



31.1 Frey 1877b Frey 1877, 118 



formula: water 100, barium chloride 40, sulfuric acid q.s., glycerol 10, ale. 10 

 prepar.\tion: Dissolve barium chloride in water. Add sulfuric acid drop by drop till no 



further ppt. forms. Leave 24 hours, then pour off one-half of supernatant fluid. Add 



glycerol and ale. to residue. 



31.1 Mayer 1888 14246,8:307 



formula: water 105, potassium ferrocyanide 2, ferric chloride 1 



preparation: Dissolve potassium ferrocyanide in 5 water. Add ferric; chloride anil 100 

 water to ferrocyanide solution slowly and with constant agitation. 



31.1 Mayer 1910 Lee and Mayer 1910, 250 



formula: water 100, gelatin 10, chloral hydrate 10 

 preparation: Melt gelatin in water. Add chloral hydrate to hot solution. 



31.1 Mozejko 1910 23632,27:374 



formula: water 100, gelatin 7.5, sodium salicylate 12.5 

 preparation: Melt gelatin in water. Add sodium salicylate to hot mixture. 



31.1 Pearl 1902 see V 31.1 Tandler 1901 (note) 



31.1 Ranvier 1875 Ranvier 1875, 120 



formula: V 31.1 Beale 1880b 80, glycerol 20 



31.1 Richardson test. 1880 Beale Beale 1880, 110 



formula: water 30, 95% ale. 4, glycerol 60, potassium ferrocyanide 0.65, ferrous sulfate 

 0.33 

 preparation: Dissolve the potassium ferrocyanide in 15 water with 30 glycerol. Dis- 

 solve the ferrous sulfate in 15 water with 30 glycerol. Add slowly and with constant 

 stirring to ferrocyanide solution. Add 95% ale. to mixture. 



31.1 Richardson tcsl. 1877 Frey Frey 1877, 117 



formula: water 100, potassium ferrocyanide 3.3, ferrous sulfate 1 

 preparation: Dissolve potassium ferrocyanide in 50 water. Dissolve ferrous sulfate in 



50 water. Add slowly, with constant stirring, to ferrocyanide. 

 note: Frey (loc. cit. p. 118) states that if the quantities of salts be doubled, glycerol may 



be substituted for half the water. 



31.1 Robin 1871a Robin 1871, 33 



formula : glycerol 100, acetic acid 5, carmine 3 



preparation: Grind carmine in 50 glycerol to a smooth mass. Mix acetic acid in 50 

 glycerine and add drop by drop, with constant stirring, to carmine until pH about 4. 



31.1 Robin 1871b Robin 1871, 34 



formi'la: sat. sol. {circ. 30%) potassium ferrocyanide 13, glycerol 64, sat. sol. {circ. 



32%,) copper sulfate 23 

 preparation: Mix ferrocyanide in 32 glycerol. Mix the copper sulfate in 32 glycerol. 



Add to ferrocyanide drop by drop with constant agitation. 



31.1 Robin 1871c Robin 1871, 35 



formula: sat. sol. (circ. 30%) potassium ferrocyanide 45, glycerol 50, 27% ferric 



chloride 1.5 

 preparation: Mix the ferrocyanide in 25 glycerol. Mix ferric chloride in 25 glycerol. 



Add drop by drop, with constant stirring, to ferrocyanide solution. 



31.1 Robin 1871d Robin 1871, 36 



formula: water 70, glycerol 100, cadmium sulfate 30, sodium sulfide 20 

 preparation: Dissolve cadium sulfate in 40 water with 50 glycerol. Dissolve sodium 



sulfide in 30 water with 50 glycerol. Mix slowly and with constant stirring into 



cadmium solution. 



