60 



C. U. C. p. ALUMNI JOURNAL 



April, 1918 







Conducted by Prof. H. V. Amy. 



GENERAL INFORMATION. 



1. Telephone inquiries will be an- 

 swered cheerfully without charge. Res- 

 idents of Greater New York or vicinity 

 wishing to inquire about some pharma- 

 ceutical problem will ring up the Infor- 

 mation Bureau, Columbus 117, and will 

 receive information immediately, if same 

 is accessible. 



2. Non-residents will have their prob- 

 lems answered in the next issue of the 

 C. U. C. P. Alumni Journal without 

 cost, if they send their inquiries by mail. 



3. Those not wishing to wait for their 

 information until the next issue of the 

 Journal, may have their inquiries an- 

 szvered by mail by enclosing a self-ad- 

 dressed stamped envelope. 



4. Problems requiring extended re- 

 search will be handled for a fee as mod- 

 erate as consistent with high grade ser- 

 vice. 



5. Translations of articles from for- 

 eign languages, either in full or in ab- 

 stract, as well as transcripts of papers 

 appearing in English or American phar- 

 maceutical, chemical or botanical periodi- 

 cals will be prepared for those desiring 

 to pay for such service. 



6. As in the past, all visitors to the 

 library, desiring to do their own research 

 work, will be given courteous attention. 



H. V. Arny, Librarian. 

 Adelaide Rudolph, Bibliography. 

 Hugo H. Schaf.fer, Queries. 



ANSWERS TO QUERIES. 



Blood Tests.— E. F., New Jersey.— 

 Below is given the procedure followed 

 in making the blood tests you desire : 



Guaiac Test. — To 5 mils of water in 

 a test-tube add 2 drops of blood. By 

 means of a pipette drop an alcoholic so- 

 lution of guaiac (strength about i :6o) 

 into the resulting mixture until a turbid- 

 ity is observed, then add old oil of tur- 

 pentine or hydrogen dioxide, drop by 

 drop, until a blue color is obtained. In 

 the detection of small amounts of blood 

 the quantity of guaiac used should be 

 decreased (milk, pus, saliva, sometimes 

 react). 



Benzidine Reaction. — This is one of 

 the most delicate of the reactions for the 

 detection of blood. Different benzidine 

 preparations vary greatly in their sensi- 

 tiveness, however. Inasmuch as benzi- 

 dine solutions change readily upon con- 

 tact with light it is essential that they be 

 kept in a dark place. To a saturated so- 

 lution of benzidine in alcohol or glacial 

 acetic add an equal volume of 3 per cent, 

 hydrogen dioxide and i mil of the solu- 

 tion under examination. If the mixture 

 is not already acid render it so with acetic 

 acid, and note t.he appearance of a green 

 or blue color. A control test should be 

 made substituting water for the solution 

 under examination. 



