V 11.2 VAEIOUS FORMULAS G53 



11.2 Brooke test. 1880 Beale flexible Brunswick black Beale 1880, 55 



formula: Brunswick black 90, rubber solution 10 

 note: Beale does not specify proportions. Those given have served the author. 



11.2 Carney test. 1937 Gatenby and Cowdry Gatenby and Cowdry 1937, 232 



formula: tolu balsam U), (Janada balsam 20, chloroform 30, shellac 20 

 preparation: Mix tolu balsam and Canada balsam with heat. Cool. Dissolve chloro- 

 form in shellac. Add to cooled mixture. 

 note: The cement is to be diluted with chloroform until it flows freely from the brush. 



11.2 Chevalier 1882 Chevalier 1882, 305 



formula: asphalt 15, turpentine 15, gold size 60 

 preparation: Dissolve asphalt in turpentine. Add gold size to solution. 



11.2 Davies circ. 1865 Davies, 24 



formula: rubber 0.5, ligroin 70, asphalt 30 

 preparation: Dissolve rubber in ligroin. Dissolve asphalt in solution. 



11.2 Eulenstein test. 1880 Beale Brunswick black Beale 1880, 55 



formula: Brunswick black 50, gold size 50, Canada balsam 5 



11.2 Frey 1877 Frey 1877, 133 



formula: chloroform 80, rubber 1.25, gum mastic 20 



preparation: Dissolve chloroform in rubber 1.25. Add gum mastic in fine powder to 

 solution. 



11.2 Gage 1901 Gage 1901, 204 



formula: V 11.2 Hitchcock 1884 100, Venice turpentine 2, castor oil 2 

 note: Spence 1938 {Microscope, 2:127) omits the Venice turpentine. 



11.2 Gram-Riitzon test. 1883 Behrens cit. Poulsen Behrens 1883, 191 



formula: abs. ale. 25, ether 50, Canada balsam 25, shellac 25 



11.2 Groves test. 1883 Hogg Hogg 1883, 246 



formula: chloroform 50, gum mastic 50, bismuth nitrate q.s. 



preparation: Dissolve chloroform in gum mastic. Add enough bismuth nitrate to form 

 a thick cream with gum solution. 



11.2 Hitchcock 1884 test. Gage 1901 Gage 1901, 204 



preparation: Half fill a bottle with shellac. Fill with 90% ale. and leave to complete 

 solution. Place in a separatory funnel with one-half its volume of naphtha. Shake well, 

 allow to separate, retain the ale. fraction, and evaporate to suitable consistency. 

 note: This method of dewaxing shellac is said by Spence 1938 {Microscope, 2 :127) to be 

 due to Pelz, about 1876. It is certainly German in origin, since benzol (an obvious 

 mistranslation of benzin) is frequently specified. Bellido 1897 (11360, 47:9) merely 

 decants the clear supernant fluid from an alcoholic solution of shellac which has stood 

 for some weeks. 



11.2 Hogg 1883a Hogg 1883, 221 



formula: gum damar 20, turpentine 20, gum mastic 20, chloroform 40 

 preparation: Dissolve gum damar 20 and turpentine with heat. Cool. P'ilter. Dissolve 

 gum mastic and chloroform in cold. Filter. Mix with filtered damar. 



11.2 Hogg 1883b Hogg 1883, 222 



formula: acetic acid 90, gum ammoniac 2, gelatin 20 



preparation: Dissolve gum ammoniac in acetic acid. Dissolve gelatin in gum .solution. 

 note: This formula wets gla.ss readily and was originally designed for sealing glycerol 

 mounts. 



11.2 James 1885 11360, 1101 



formula: gum damar 40, ligroin 100, zinc oxide q.s. 

 prepar.\tion: Dissolve gum damar in ligroin. Heat zinc oxide to dryness. Cool. Moisten 



with benzine. Add damar solution with constant stirring. Leave 12 hours. Decant from 



any gross particles. 



