LABORATORY RULES 



1. Do not bring coats, sweaters, hats, etc., into the 

 laboratory and lay them on desks, etc.; hang them in the 

 place provided for the purpose. 



2. Before beginning and after finishing work, the top 

 of the desks must be washed off with a liberal supply of 

 1-1000 mercuric chloride. This will destroy all micro- 

 organisms and their spores and aid greatly in rendering 

 aseptic technic possible. A large bottle of this disinfectant 

 will be found near each desk. 



3. Do not put string, paper, pencils, pins, etc., in the 

 mouth nor moisten labels with the tongue while in the 

 laboratory. Follow this practice outside of the laboratory 

 also. Food should not be eaten in the laboratory. 



4. Observe all possible cleanliness and neatness in the 

 care of apparatus, desk, microscope, etc. 



5. Apparatus must be kept inside the desks, but not 

 cultures. Cultures must be kept at a constant temperature 

 in the place fitted for this purpose. 



The microscope and accessories must be returned to 

 the case at the close of the work. 



6. Water, gas, steam and electricity are to be turned off 

 when not in use. This applies to the individual desks, large 

 sinks, steam (including autoclav), hot-air sterilizers, etc. 



7. Put all solid waste material, cotton, paper, matches, 

 coagulated milk, etc., and waste liquid which will solidify 

 when cold (agar, gelatin) into receptacles provided for that 

 purpose, not into the sinks. 



8. Apparatus, media, etc., should be removed from steam 

 heaters, immediately after steaming. 



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