BACTERIOLOGY IN A NUTSHELL. 



peroxide of hydrogen? What precautions 

 should be taken to prevent its becoming inert? 



IV. — What can you say of the value of lime 

 as a disinfectant? How would you prepare it 

 for use ? 



V. — Name several points in favor of the use 

 of lysol as an antiseptic. Also mention one or 

 two disadvantages of potassium permanganate. 



VI. — In what ways does the use of normal 

 salt solution benefit the patient when used dur- 

 ing or after operation ? 



VII. — What advantage has formalin solu- 

 tion over bichloride of mercury for disinfecting 

 excreta ? 



VIII. — Why is the free use of boracic acid 

 safe ? 



IX. — How is the "American Standard" solu- 

 tion prepared ? Also "Thiersch's Solution ?" 

 What per cent solutions of the balsam of Peru 

 are used ? Mention a common base. 



X. — Describe the method of sterilizing water, 

 Is it safe to sterilize water without filtering? 

 And is distilled water safe to use in aseptic 

 surgery without sterilizing? , 



XL — Describe the process of sulphur fumi- 

 gation. What are its disadvantages ? 



XII. — What is formaldehyde? State why 

 it is a more reliable substance to use for fumi- 

 gation than sulphur. Has its use any disad- 

 vantages ? 



144 



