THE ALUMNI JOURNAL. 



239 



acid, A solution of resorcin yields a violet col- 

 or with sodium hypochlorite, which fades to yel- 

 low; with more hypochlorite solution and heat, 

 a yellowish red or brown color is produced. If 

 before the addition of the hypochlorite, ammo- 

 nia is added, a violet color is first produced, 

 which changes to yellow and upon heating is 

 converted into dark green. 



Phenol, salicylic acid and benzoic acid yield 

 a slight color with hypochlorite only upon heat- 

 ing. Upon previous addition of ammonia the 

 acids are not colored, 



Boedecker's test for albumen. If to a solu- 

 tion containing albumen {e. g. urine), which is 

 acidulated with acetic acid, potassium ferrocy- 

 anide is added, a turbidity or flocculent precip- 

 itate is produced. 



Boettger's (also Boettcher's) test for glucose. 

 A dilute solution of glucose (or diabetic urine) 

 is heated with a solution of sodium carbonate 

 and some bismuth subnitrate or bismuth oxy- 

 hydrate. If reduction takes place the suspend- 

 ed bismuth compound is blackened. Accord- 

 ing to Kruegef, a stable reagent can be prepar- 

 ed by heating 15 g. bismuth nitrate, 15 

 g. tartaric acid, 75 g. water and the addition of 

 sufl&cient aqueous potassa to effect solution, 

 and some glycerin. 



Boettger's test for the red color of wine con- 

 sists in the addition of i volume of concentrated 

 copper sulphate solution to 3 volumes of wine 

 diluted to ten times its volume. Pure red wine 

 is thereby discolored. Unfermented wine as 

 well as the coloring matter of bilberry, malva, 

 cherries, also fuchsin remain unchanged or are 

 colored violet. 



Boettger's reagent for ozone. Filter paper 

 saturated with solution of gold chloride free 

 from acid is colored violet by ozone. A test 

 paper formerly suggested by i5o^/f/^^r contained 

 thallium hydroxide, which was colored brown 

 by ozone. 



Boettger's test for sugar in glycerin. 5 drops 

 of glycerin are heated to boiling with 100 drops 

 of water, i drop of nitric acid, specifac gravity 

 1.3, and 0.03 to 0.04 gram, ammonium molyb- 

 date. If sugar is present the solution is colored 

 intensely blue,* 



Boettger's reagent for hydrogen peroxide. If 

 to a solution containing hydrogen peroxide a 

 solution of starch cadmium iodide and little fer- 

 rous sulphate is added, the blue color of starch 

 iodide is produced. (Also known as Schoen- 

 bein^s reagent.) 



(To be continued.) 



MISCELLANEOUS NOTES. 



ESTIMATION OF MORPHINE IN OPIUM. 

 G. Loofif has found that sodium salicylate re- 

 moves those substances which prevent the pre- 

 cipitation of morphine in opium products, and 

 on this fact bases the following process: 5 

 grms. of the finely powdered opium are triturat- 

 ed with water, and the mixture is made up to a 

 total weight of 44 grms. in a tared flask, which 

 is then closed and well shaken for 15 minutes. 

 I grm. of sodium salicylate is added, the shak- 

 ing repeated for a few minutes, and the liquid 

 filtered. 25.8 grms. (=3 grms. opium) of the 

 filtrate are well shaken for 10 minutes with 3 

 grms. of ether and i grm. of ammonia solution, 

 and the separated morphine collected on a 

 small filter, washed with water, dried, washed 

 with benzine, again dried and weighed.— /^/o^/z. 

 Zeit. /Sg6, //, 192. 



ODONTODOL FOR TOOTHACHE. 



French medical journals state that odontodol 

 is the name given in Italy to a new preparation 

 which is superior to all others known in the 

 treatment of toothache. The formula is as fol- 

 lows: 



Cocaiue hydrochloride S- i 



Essence cherry-laurel g- ' 



Tincture arnica S- '° 



Solution amonium acetate g- 20 



If the pain is caused by caries, a piece of cot 

 ton saturated with the liquid is put into the 

 cavity of the tooth; if it is caused by inflamma- 

 tion of the pulp, the mouth should be washed 

 out with a solution consisting of 30 grams of 

 odontodol diluted with 50 grams of a tepid de- 

 coction of linseed. Finally, if the pain extends 

 to the entire jaw, the painful surface should be 

 thoroughly rubbed with several drops of odon- 

 todol, after rinsing the mouth with the solution , 



M. P. J. 



*This is Mason's test for glucose in glycerin published 

 i n 1872.— Ed. 



A NoN-poisoNous Match 

 Has been invented by a distinguished chemist 

 M. Ponleaux, according to the Medical News. 

 "Potassium permanganate andamyl acetate are 

 among the inoffensive ingredients. At the Pas- 

 teur Lucifer Match manufactory, the combina- 

 tion has been tested with satisfactory results. 

 The matches are easily made, without the slight- 

 est danger to the factory hands. They ignite 

 readily, there is no danger of explosion when 

 stored, and the disagreeable odor common to 

 lucifer matches is in these replaced by a posi- 

 tively agreeable one." 



