INTRODUCTION 11 



4. Preserve all cultures, except liquefied gelatin plates, for 

 one week before discarding. 



5. Place all discarded cultures and slides in receptacles 

 provided for that purpose. If they are not provided, obtain 

 them. 



6. Label everything and do it legibly. 



7. If a culture be dropped on the floor, breaking the glass, 

 do not clean it up until everything has been disinfected for 

 one hour; wet a towel in antiseptic solution and cover the 

 entire infected area. 



8. Clean the oil-immersion lens before leaving the labora- 

 tory. 



9. Keep all room temperature cultures in dark, dust-free 

 closets. 



10. Do not keep gas burners lighted when not in use. Do 

 not allow sterilizers and water baths to boil dry. Do not 

 leave stoppers out of bottles. Do not take more media, 

 stains, and other supplies than you need. 



11. Clean oil from the condenser, lens, and mirror of the 

 dark-field apparatus before leaving for the day. If you do 

 not, it will have to be done in the morning before the 

 apparatus can be used, and will then be much more difficult. 



12. Remember that it is as important to keep accurate 

 records as to carry on accurate tests. 



The following tabulation is suggested as a general plan for 

 the organization of the laboratory: 



1. The Chief of the Laboratory should organize his depart- 

 ment so that he will be relieved of routine work, will have 

 time to act as consultant on the laboratory findings to the 

 hospital and to the Camp Surgeon, as well as have time for 

 administrative detail. 



2. It is suggested that the laboratory personnel be divided 

 into groups with an individual with special training along a 

 specific line in charge of each group. For types of work 

 requiring technical skill and experience, such as pneumo- 



