780 EXPERIMENT STATION RECORD. [Vol.40 



The bacteriological testing 1 of disinfectants (Jour. State Mrd., 21 (1919), 

 No. 2. pp. 53-62 ) .—This is a report of an investigation, conducted at the re- 

 search laboratories of the Royal Institute Of Public Health (England), of the 

 difficulties attending the testing <>f disinfectants by the Rideal-Walker method. 



As the result of a stud; of the possible sources of error, it is concluded that 

 the varying character of the peptone used in preparing the medium for the 

 growth of the test organism bas been the chief cause of the difficulties in obtain- 

 ing concordant results as compared with prewar times. It is suggested that the 

 test would be much simplified if a definite time of contact, the same for all the 

 dilutions, were used. The coefflcienl would then indicate thai disinfection 

 had been Obtained after a known interval of action. 



The disinfecting power of Sagrotan as determined by the use of optimal 

 culture media, A. Dengles (Hyg. Rundschau, 2* (I9is\. Nos, 1, pp. 1-8; 2, pp. 

 87-'f2). — A discussion is given of the precautions to be taken in a study of the 

 strength of disinfectants by the growth of pathogenic organisms in media con- 

 taining varying amounts of the disinfectant under question. The necessity is 

 pointed out of producing highly resistant strains of the organisms, of the use of 

 uniform suspensions of the organisms or spores, and particularly of employing 

 for the "after-CUlture" optimal media for growth, as pointed out by Siiptle and 

 Dengler I K. s. it.. 35, p. 279). 



An examination of Sagrotan b\ the methods outlined is reported. Contrary to 



the conclusions of SctlOtteliUS ( K S K.. 82, p. 80), it w:is found to have a some- 

 what lower disinfecting value than lysol. It is recommended that as a surgical 

 dlslnfectanl Sagrotan be used in concentrations of not less than from 3 to 4 

 per cent. 



Treatment of burns by paraffin. A. J. Hint ( lot. in Rev. Biff, y Sani&ad 

 PeouarUu [Spain], 7 </.''/?>. No. ■', <;_/». .:.■;.■ Vet. A'".. 3d [1918), Wo. 1560, p. 

 18}). In socking a substitute for ambrine. a commercial product which has 

 given excellent results in the treatment of burns, after many experiments the 

 author has arrived at the following formula which has given even better results 

 than the commercial producl : Resordn l part, essence of eucalyptus '-. olive oil 

 5, vaseline 26, and hard paraffin <">7 parts. 



The treatment of ulcerous lymphangitis. It. Van SaceGHEM (Rul. Soc. 

 Path. K.rut.. ii (1918), No. 8, p,,. 688 885; no*, in Vet. Rev., 3 [1919), No. 1. pp. 

 SS. .Hn. In the treatment of ulcerous lymphangitis the author has substituted 

 for the Subcutaneous injection of pus treated with ether intravenous injections 

 of pus emulsified with oil. The pus, obtained from a natural abscess of ulcerative 

 lymphangitis or from an artificially produced abscess, is mixed with equal vol- 

 umes of oil and ether ami shaken at intervals for -ts bours. The supernatant 

 fluid is then decanted, and the pus drawn into a syringe and injected directly 

 into the jugular vein in Increasing doses of from '3 to 7 cc. or more. It is said 

 that no local reaction is produced, and that the thermal reaction rarely exceeds 

 1° or lasts more than three days. Keinjection is performed after the tempera- 

 ture has become normal, and after each series of five injections the treatment 

 is suspended fur several days. 



The author points out that pyotherapy and leucocytotherapy produce cures 

 but not immunity, and stales that experiments are being conducted with the 

 view of establishing immunity by vaccination with living bacteria obtained from 

 horses affected with ulcerative lymphangitis. 



Studies on the paratyphoid-enteritidis group.— VI, The separation of a 

 distinct paratyphoid group among strains of rodent origin, C. KurMwiEnK. 

 jr., E. Valentine, and L. a. Kohh (Jour. Med. Research, 39 (1919), v., j, pp. 

 449-460). — The authors report the results of further Investigations (E, s. it, 

 39, p. 587). 



