BAIRD &TATLOCK (LOM)ON) LTD. 



804 



807 



804 T Haemoglobinometer, Dr. Gowers', for the clinical estimation of haemoglobin, in case each 

 Separate parts : 



A. Drop bottle ........ 



B. Pipette 



C and D. Standard colour tube, with graduated tube 



E. Stand 



F. Needle, guarded . . . . . . . . ,, 



805' Gowers' Haemacytometer and Haemoglobinometer combined in one case . . 



806' Dr. Haldane's Modification of Gowers' Haemoglobinometer, with descriptive pamphlet 

 Separate parts : 

 A and B. Standard colour tubes . . . . . . . . per pair 



C. Pipette, 20 cubic millimetres . . . . . . . . . - each 



DESCRIPTION. 



(A) Bottle with pipette stopper for holding the diluting solution. (B) Capillary pipette for measuring 

 the blood, (c) Graduated tube for measuring the amount of haemoglobin. (D) Standard tint of normal 

 blood. (E) Support for (D) and (c). (F) Puncturing needle. 



(See Report of the Meeting of the Clinical Society for I3th December, 1878.) 



3 7 

 1 11 



807' Haemoglobinometer, Gower-Sahli's pattern 



each 



INSTRUCTIONS FOR GOWER'S H^MOGLOBINOMETER, 

 MODIFIED BY PROF. SAHLI. 



Into the empty graduated glass tube, pour a few drops of pure water, then make an incision with the lancet 

 on the finger tip of the patient ; the cut must not be too superficial otherwise a sufficiency of blood may not 

 be obtained. Any pressure on the finger to hasten the discharge of blood must be exercised only at some distance 

 from the wound, otherwise there is a risk of diluting the blood with the serum from the flesh. When a large 

 drop of blood has been obtained, 20 cubic millimetres are sucked into the capillary pipette up to the mark, carefully 

 wiping the end of the pipette with some cotton wool and taking care to avoid drawing any of the blood out of 

 the pipette. Now blow this measured quantity of blood into the graduated tube, and mix well with the water. 



By means of the larger pipette dilute this mixture, shaking all the time, until the red corpuscles are dissolved 

 into haemoglobin solution, and the colour of the solution is the same as that in the tube filled with glycerine 

 picrocarmine. By the quantity of water required in the dilution the percentage of haemoglobin in the sample 

 of blood is obtained. 



The Standard Solution in the glass tube with closed ends is so coloured that it corresponds accurately to 

 a i per cent, solution of normal blood. The graduations in the testing tube each represent a volume of 20 cubic 

 millimetres. Thus if we dilute the 20 cubic millimetres of blood up to the 100 mark we have a i per cent, blood 

 solution, and if the blood ha^ a normal percentage of haemoglobin, this mixture will correspond exactly in depth 

 of colour to the standard solution. 



14 -CROSS STREET HATTOTST GARDETST E-C 



