APPENDIX 203 



Antihuman amboceptor slips, each containing two 

 amboceptor units. 



Complement slips, each containing sufficient com- 

 plement for one tube. 



Antigen slips, each containing sufficient for one 

 tube. 



These papers can be kept indefinitely at room 

 temperature in a dry place. Prior to using the slips 

 for a blood test it is necessary to make preliminary 

 tests to prove their activity and strength. 



In employing the filter paper slips they are 

 dropped by means of a forceps into the test tubes 

 containing the human blood suspension and patient's 

 serum in the order and at the intervals already 

 stated for the respective reagents. If an incubator 

 is not at hand, the tubes can be kept warm by 

 carrying them in the vest pocket. 



