266 THE INCOME OF ENERGY 



5. In a healthy woman. 



Hammerschlag found the specific gravity in 

 chlorosis and nephritis diminished as the hsemo- 

 globin diminished. No relation was observed 

 between the appearance of oedema and a reduc- 

 tion in the specific gravity. 



COUNTING THE CORPUSCLES 



Counting the Red Corpuscles. See that the 

 pipettes of the Thoma-Zeiss apparatus are per- 

 fectly clean and dry. Open the bottle contain- 

 ing Gower's solution (sodium sulphate, 7.3 grams ; 

 acetic acid, 20 c.c. ; water, 125 c.c.). Prick the 

 ear as directed on page 264. In a large drop 

 which has collected without pressure put the 

 point of the smaller Thoma-Zeiss pipette ( " red 

 counter " ). Fill the pipette to the mark 0.5 by 

 careful suction. Should the mark be passed, 

 lower the column to the mark by touching the 

 point of the pipette to filter paper. When the 

 mark is reached, clean the outside of the pipette, 

 dip the end in Gower's diluent solution, and 

 draw the liquid very carefully up to the mark 

 101. (Should the liquid pass the mark, the 

 pipette must be cleaned and dried and the whole 

 process repeated.) Close the ends of the pipette 

 with the fingers, and shake it gently for one 



