GENERAL APPARATUS 19 



diameter of 2 millimetres, and should be kept in water 

 which has been sterilised. 



4. A watch-maker's file for removing the sealed 

 ends of the capillary tubes. 



5. Hair-lip pins are most convenient for pricking 

 the finger or the ear to obtain the blood. 



6. Two or three needles in handles for teasing out 

 tissues, etc. 



7. Pipettes; several 1-cc. pipettes, graduated in lOths 

 and lOOths; a graduated 10-cc. pipette, and one or 

 two ungraduated of 5-cc., 3-cc. and 2-cc.-capacity. 



8. Two beakers. These are used for boiling water 

 in. The jellies are melted and made liquid by im- 

 mersing the test-tubes containing them in water which 

 is boiling in the beakers. 



9. Tripod stand and gauze cover. 



10. A Bunsen burner or good spirit-lamp. 



11. A 100-cc. graduated measure. 



12. Two small flasks. 



13. Some glass funnels and filter paper. 



14. A selection of test-tubes. 



15. A centrifuge. 



16. An ordinary chemical Centigrade thermometer 

 for recording the room temperature. 



17. A good incubator, which should maintain a 

 temperature of 37 Centigrade, i.e. the temperature of 

 the blood. Hearson's is a very good one, but any of 

 the ordinary water-jacketed types will do. An auto- 

 matic thermostat is a convenience. 



18. The microscope is the most important part of 

 the outfit, and it should be a good one. 



