1894.] MICROSCOPICAL JOURNAL. 155 



METHYL VIOLET B. Paris Violet. Direct Violet. Violet ol Methyl 

 Aniline. PYOKTANIN. 



Metallic green shining fragments or powder. 



In water, solnble w ith violet color. Alcoliol, solnhle, also in amyl alcohol. 

 H CI to watery solution, at first green then on addition of more acid, deep 

 golden brown sol n lion. Na OH to watery solution, brownish red color and 

 precipitate. H2 SO4 Cone, yellow. Dilution with water, yellowish green, 

 then bluish green, finally violet. 



There is another Methyl Violet. 6 B. Benzyl Violet. Paris Violet. 6 B. 

 that comes in metallic brownish shining fragments or powder. Its reactions 

 are identical with Methyl Violet B. 



METHYLEN BLUE. B. B C^. B. B. in powder extra D. Methylen Blue. 

 B. B. in powder extra. Aethylen Blue. 



Dark blue or reddish brown, bronze shining powder. 



In water, easily soluble with blue color. In alcohol soluble. HCl to 

 watery solution no change. Na OH to watery solution, violet color. INIudi 

 concentrated Na OH produces a dirty violet precipitate. Hj 80t concentrated 

 golden green solution. Dilution with water, blue solution. 



PICRIC ACID. 



Pale yellowish crystals. 



In water, with difficulty soluble in cold, more readily soluble in warm 

 water. Soluble in alcohol. Benzol : melts at 122.5 and has a bitter taste. 

 With Potass. Cyanide, a brown solution. 



SAFRANIN. Safranin T. Safranin Extra G. Safraniu S. Aniline Rose. 

 Old name Pink. 



Red brown powder. 



In water, soluble with red color. In alcohol, red solution with yellowish 

 red fluorescence. HCl to a watery solution, blue violet solution. NaOH to 

 watery solution, brownish red precipitate. Cone. H2 SO4 green solution. 

 Dilution with water, from blue passing to red. 



EDITORIAL. 



Progress. — When the present President of the Royal College 

 of Physicitins of London was a student at University College 

 Ho-ipital (45 years ago) one of the professors said to him : 

 " There has been a novelty introduced into the wards. There is 

 a microscope for ward A and one for ward B. Now if anything 

 is so small that it needs a microscope to see it, I do not think it 

 can be of very great importance." 



To-day only an ignoramus of the wor.st sort or an insane man 

 could make such a remark. The greatest sanitary battle to-day 

 is with the unseen enemies of our bodies. 



Meeting of Michigan State Board of Health, Lansing, 

 April 13, 1894.— During the past year this Board has done 

 much good work, including that in connection with quarantine 

 and the prevention of the introduction of dangerous commuO' 



