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C. U. C. P. ALUMNI JOURNAL 



or of ammonium sulphide must not show 

 any reaction. If i gramme of theacylon 

 be mixed with 3 mils of solution of stan- 

 nous chloride, no reduction should take 

 place within one hour. 



Quantitative Determination : 0,5 

 gramme of theacylon is decomposed in a 

 Kjeldahl flask with 50 mils of concen- 

 trated sulphuric acid, containing 10 per 

 cent, of phosphoric anhydride, 0,5 

 gramme of copper oxide and several crys- 

 tals of potassium permanganate. Upon 

 cooling the mixture is diluted with 

 water, and after addition of solution of 

 sodium hydroxide, is subjected to dis- 

 tillation. The distillate is collected in 50 

 mils of y^ normal hydrochloric acid, me- 

 thyl orange being used as indicator, i 

 mil of Ys normal hydrochloric acid is 

 the equivalent of 0,09005 gramme of the- 

 obromin. Theacylon theoretically con- 

 tains 52,60 per cent, of theobromin. 



Theacylon is practically tasteless, thus 

 possessing an important advantage over 

 theobromin sodium salicylate, whose sa- 

 line taste is offensive to many patients. 

 While the latter compound is readily de- 

 composed by action of the gastric juice, 

 theacylon is not acted upon at all. The 

 alkaline intestinal secretions saponify it 

 at once, breaking it up into salicylic acid 

 and theobromin. It does not produce di- 

 gestive disturbances, as do most of the 

 other theobromin preparations, and can 

 therefore be used almost under any con- 

 ditions. In the very rare cases where it 

 seems to produce nausea and vomiting, 

 this is no doubt caused by a much dimin- 

 ished secretion of hydrochloric acid. In 

 most of such cases the administration of 

 small quantities of hydrochloric acid ob- 

 viates the difficulty. It may be given in 

 0,5 gramme doses from 3 to 5 times 

 daily, in form of powder or tablets. 



Liquids for Etching on Metals. 



The following recipes were published 

 in a recent number of the Bayr. Ind. u. 

 Gew. Bl. For soft steel: i part of 

 nitric acid and 4 parts of water. 

 For hard steel : 2 parts of nitric acid 

 and I part of acetic acid. For deep 

 etching of both : 10 parts of hydro- 

 chloric acid, 2 parts of potassium chlor- 

 ate and 88 parts of water. For bronze: 

 100 parts of nitric acid and 5 parts of 

 hydrochloric acid For brass: 16 parts 

 of nitric acid, diluted with 160 parts of 

 water. 6 parts of potassium chlorate 

 are then dissolved in 100 parts of water, 

 and the solution added to the diluted 

 acid. To protect the parts of metal 

 which are not to be subjected to the etch- 

 ing process, the use of liquid asphalt is 

 recommended. 



N EW REMEDIE S. 



Aivosan. Under this name tablets are 

 marketed, which, according to the maker, 

 contain the following named medicinal 

 substances : Aetherospermin (alkaloid 

 obtained from aetherosperma moscha- 

 tum), viscum album, natrium formicum, 

 kalium jodatum and acidum lacticum. 

 They are said to be efficient m arterial 

 sclerosis. 



Wetol is a remedy said to be efficient 

 in the treatment of minor wounds, cuts, 

 bruises, etc. It contains oil of cloves, 

 oil of eucalyptus, oil of myrrh, oil of tur- 

 pentine, menthol, thymol, camphor, bal- 

 sam of peru, linseed oil and cod-liver 

 oil. 



Lnstosargin is the name given to a 

 colloidal preparation of iodide of mer- 

 cury. It is a feebly opalescent, pale yel- 

 low solution, which is readily decom- 

 posed upon addition of acids, while it is 



